what is the answer to this question
Answer:
D is the answer
Step-by-step explanation:
The brain volumes (cm³) of 20 brains have a mean of 1085.2 cm³ and a standard deviation of 125.6 cm³. Use the
given standard deviation and the range rule of thumb to identify the limits separating values that are significantly low or
significantly high. For such data, would a brain volume of 1386.4 cm³ be significantly high?
If the brain volumes (cm³) of 20 brains have a mean of 1085.2 cm³ and a standard deviation of 125.6 cm³. For such data: it is significantly low for a brain because 1386.4 cm³ is less than the upper limit.
How to find the lower and upper limits?Mean = 1085.2 cm³
Standard deviation = 125.6 cm³
Hence,
Lower limit = Mean - 2 x Standard deviation
Lower limit =1085.2 - 2 x 125.6
Lower limit =1161.2 - 251.2
Lower limit =910
Upper Limit = Mean + 2 x Standard deviation
Upper Limit = 1161.2 + 2 x 125.6
Upper Limit =1161.2 +251.2
Upper Limit =1412.4
The limit of values is from 910 to 1412.4.
A value below 910 will be is considered low and a value above 1412.4 will be considered high
Therefore 1386.4 cm³ is less than the upper limit. Thus it is significantly low for a brain.
Learn more about lower and upper limits here:https://brainly.com/question/16793431
#SPJ1
80 items were sold, bringing in $6,900 in receipts. Some items were sold at a discount for $75 each and some others were sold at full price for $90 each. How many were sold at discount and how many at full price?
Answer:
50 items were sold for $75
35 items were sold for $90
Step-by-step explanation:
75 x 50 = 3750
90 x 35 = 3150
3750 +3150 = 6,900
Commitment to goals can be promoted in which of the following ways?
Commitment to goals can be promoted in through:
by imagining how you will feel when you achieve themby identifying who or what might keep you from achieving themWhat is goal commitment?Goal commitment is the degree of determination a person uses to achieve an accepted goal, and it is determined by two major factors: importance and self-efficacy. The reasons a person has for achieving a goal, including expectations of certain outcomes, are significant. Commitment helps you stick to your goals in both good and bad times, when obstacles arise. Commitment is influenced by two factors: importance and
Goal commitment is generally defined as an individual's determination to devote time and effort to achieving a goal.
Goal commitment is the degree of determination a person uses to achieve an accepted goal, and it is determined by two major factors: importance and self-efficacy. The reasons a person has for achieving a goal, including expectations of certain.
Learn more about goal on:
https://brainly.com/question/24693533
#SPJ1
Give the slope between the points
(-5,-3) (-1,-8)
PLESSSSSSSSSSSSSS| HELP ME ):
Which of the following can be used to construct a triangle?
A) 10cm 13cm 24cm
B) 14cm 32m 28cm
C) 25cm 13cm 22cm
D) 5cm 8cm 20cm
Answer:
the answer is simple, because you have to add up each side of the triangle and match those sides with your choices. btw its C
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
Use Pythagorean Theorem:
a^2 + b^2 = c^2
For a triangle to be a triangle a^2 +b^2 has to be larger than c^2
25^2 + 13^2 = 653
22^2 = 625
The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day. The article "Nutrient Intakes and Dietary Patterns of Older Americans: A National Study" (J. of Gerontology, 1992: M145–150) reports the following summary data on intake for a sample of males age 65–74 years: n=115, barx =11.3, and s=6.43. Does this data indicate that average daily zinc intake in the population of all males ageing 65–74 falls below the recommended allowance?
A. State the null and alternative hypotheses.
B. Calculate the test statistic
C. Define the rejection region at ?=0.05.
D. Make a decision about the test and interpret.
E. Find the p-value corresponding to the test and based on which make a decision about the test. (The decision should be the same with D.)
Answer:
H0 : μ = 15
H1 : μ < 15
−6.170774
Step-by-step explanation:
Given :
n=115, barx =11.3, and s=6.43
H0 : μ = 15
H1 : μ < 15
−0.053658 ;
The test statistic :
(xbar - μ) ÷ s/sqrt(n)
(11.3 - 15) ÷ (6.43/sqrt(115))
Test statistic = −6.170774
Rejection region :
Reject Null ; if
Tstatistic < Zcritical
The P value is 0.00001 ; using the p value from Z calculator
Since,
P value < α
0.00001 < 0.05
Reject the null
At a large regional collegiate women’s swim meet, an official records the time it takes each swimmer to swim 100 meters for all swimmers who compete in only one stroke category. The following table shows the mean times and corresponding standard deviations for the collegiate women at the swim meet for each of the four stroke categories. Stroke Category Mean 100 meter Time Standard Deviation Backstroke 55.6 seconds 0.70 seconds Breaststroke 63.3 seconds 0.92 seconds Butterfly 54.4 seconds 0.94 seconds Freestyle 50.2 seconds 0.76 seconds For each of the 4 stroke categories, consider a random variable representing the time of a randomly selected swimmer in that category. What is the standard deviation of the sum of the 4 random variables?
Answer:
1.6726
Step-by-step explanation:
square each standard deviation, add them then squareroot.
\(\rm SD = 1.6726\)
Step-by-step explanation:
Given :
Stroke Category Time Standard Deviation
Backstroke 55.6 sec 0.70 sec
Breaststroke 63.3 sec 0.92 sec
Butterfly 54.4 sec 0.94 sec
Freestyle 50.2 sec 0.76 sec
Calculation :
To find the standard deviation of the sum of the 4 random variables we need to square each of the standard deviation and add them and then take the square root.
\(\rm SD = \sqrt{(0.70^2)+(0.92^2)+(0.94^2)+(0.76^2)}\)
\(\rm SD = \sqrt{2.7976}\)
\(\rm SD = 1.6726\)
For more information, refer the link given below
https://brainly.com/question/23907081?referrer=searchResults
Eric is randomly drawing cards from a deck of 52. He first draws a red card, places it back in the deck, shuffles the deck, and then draws another card. What is the probability of drawing a red card, placing it back in the deck, and drawing another red card
Half the deck is red so you have. 1/2 chance of picking red each time.
Picking red both times would be 1/2 x 1/2 = 1/4
The answer is 1/4
The probability of drawing a red card, placing it back in the deck, and drawing another red card is 0.25 or \(\bold{\frac{1}{4}}\).
Given to us:
Eric is randomly drawing cards from a deck of 52.
Also, Eric first draws a red card, places it back in the deck, meaning this is case of probability with replacement (outcomes are returned back to the sample space again).
So, the both the events are independent of each other, therefore the probability for second event will be same as the first, as the sample size and the desired outcome are same.
Probability for first event
\(=\dfrac{Desired\ outcome}{Total\ number\ of\ samples}\\\\=\dfrac{26}{52} \\\\=\dfrac{1}{2} = 0.5\)
The probability of drawing a red card, placing it back in the deck, and drawing another red card
= Probability for first event x Probability for second event
= 0.5 x 0.5
= 0.25
Hence, the probability of drawing a red card, placing it back in the deck, and drawing another red card is 0.25 or \(\bold{\frac{1}{4}}\).
To know more visit:
https://brainly.com/question/795909
What is the vertical displacement of the basic graph to produce a graph of
OA Sunits down
B. 2 units down
OC units down
OD
units up
SUBMIT
The vertical displacement is of 2 units down, the correct option is B.
What is the vertical displacement?Remember that for a function f(x), a vertical displacement of N units is written in general form as:
g(x) = f(x) + N
If N > 0, the translation is upwards.
if N < 0, the translation is downwards.
Here we assume that we start with the parent cosine function:
y = cos(x)
And the transformed function is:
y = -2 - cos(x - π)
So we have some transformations, but the vertical translation is of 2 units down. So the correct option is B.
Learn more about translations at:
https://brainly.com/question/24850937
#SPJ1
15 Paid FTEs and have a department non-productive rate of 10%, how many productive FTEs does the department have?
Answer:
I'm sorry but I don't know but I have a question
Step-by-step explanation:
how do you post questions on the brainly app??
Answer:
15x40 = 600 x10% =60
Step-by-step explanation:
15 Paid FTEs and have a department non-productive rate of 10%, how many productive FTEs does the department have?
Out of 200 students in a senior class, 32 seniors are in the band and 64 seniors are in the band or on the honor roll. What is the probability that a randomly selected senior is both in the band and on the honor roll? Express your answer a fraction in simplest form.
The Probability that a randomly selected senior is both in the band and on the honor roll is 8/25.
To find the probability that a randomly selected senior is both in the band and on the honor roll, we need to divide the number of seniors who are in both categories by the total number of seniors.
Given:
Total number of seniors = 200
Number of seniors in the band = 32
Number of seniors in the band or on the honor roll = 64
Let's calculate the probability using these values:
Probability = Number of seniors in both categories / Total number of seniors
Probability = 64 / 200
To simplify this fraction, we can divide both the numerator and denominator by their greatest common divisor, which is 8:
Probability = (64 ÷ 8) / (200 ÷ 8)
Probability = 8 / 25
Therefore, the probability that a randomly selected senior is both in the band and on the honor roll is 8/25.
For more questions on Probability .
https://brainly.com/question/24756209
#SPJ8
Consider this function.
f(x) = |x – 4| + 6
If the domain is restricted to the portion of the graph with a positive slope, how are the domain and range of the function and its inverse related?
If we restrict the domain of the function to the portion of the graph with a positive slope, the domain of the inverse function will be the range of the original function for values of x greater than 4, and its range will be all real numbers greater than or equal to 4.
The given function f(x) = |x – 4| + 6 is a piecewise function that contains an absolute value. The absolute value function has a V-shaped graph, and the slope of the graph changes at the point where the absolute value function changes sign. In this case, that point is x=4.
If we restrict the domain of f(x) to the portion of the graph with a positive slope, we are essentially considering the piece of the graph to the right of x=4. This means that x is greater than 4, or x>4.
The domain of the inverse function, f⁻¹(x), will be the range of the original function f(x) for values of x greater than 4. This is because the inverse function reflects the original function over the line y=x. So, if we restrict the domain of f(x) to values greater than 4, the reflected section of the graph will be the range of f⁻¹(x).
The range of f(x) is all real numbers greater than or equal to 6 because the absolute value function always produces a positive or zero value and when x is greater than or equal to 4, we add 6 to that value. The range of f⁻¹(x) will be all real numbers greater than or equal to 4, as this is the domain of the reflected section of the graph.
for more such questions on domain
https://brainly.com/question/2264373
#SPJ8
I. 2a + 2b - c + d = -5
II. a + b + d = -2
III. 3a - b + 2c -d = 18
IV. 4b = -c
Hint:
Solve for c first in IV.
Solve for any variable in II next.
Solve I then.
Answer:
Wat
Step-by-step explanation:
Kind of question is this
Write the number three hundred forty two thousand six hundred eight in number form
Answer:
342:608
Step-by-step explanation:
from the start and end up to the last
This is easy but Im to lazy to answer ittt I mark BRAINLIESTTT
Figure B cannot be formed.
Lol im SimpForKirishima my account got baneed comeback kait
Answer:
ion know who that is but heyyyy and they did u dirty
Step-by-step explanation:
Answer:
RIP, you will be rested in peace
Step-by-step explanation:
What is the main idea of beauty algebra? 
Answer:
Beauty algebra is not a recognized term or concept within the field of mathematics. Therefore, there is no main idea associated with it in mathematical context. It is possible that the term is used in a different context or field, but without additional information, it is not possible to provide a more accurate answer.
what is this
⅚ x 1/10
Answer:
1/12
Step-by-step explanation:
5/6 * 1/10 = 5/60 = 1/12
Answer:
\(\frac{1}{12}\)
Step-by-step explanation:
⅚ x 1/10
(reduce those)
\(\frac{1}{6} \\\) x \(\frac{1}{2}\)
(multiply those)
\(\frac{1}{12}\\\)
(and that's your answer)
I have to add this problem
5/8+2/8
giving 10 points:)
The addition of the given fraction expression is 7/8.
In mathematics, an expression is a combination of numbers, symbols, and/or operators that represents a mathematical quantity or relationship. It can be a simple combination of numbers or a more complex combination involving variables, functions, or other mathematical constructs.
When adding fractions with the same denominator, you simply add the numerators and keep the denominator the same.
In this case, both fractions have a denominator of 8, so we can add their numerators:
5/8 + 2/8 = (5 + 2)/8 = 7/8
Thus, the sum of 5/8 and 2/8 is 7/8.
For more details regarding fractions, visit:
https://brainly.com/question/10354322
#SPJ1
URGENT!! ILL GIVE BRAINLIEST! AND 100 POINTS
Number of car sold are 98.
Number of trucks sold are 66.
Given,
Dealer 1 sold 164 cars and trucks and dealer 2 sold 229 cars and trucks .
Let number of cars sold are x.
Let number of cars sold of y .
Now,
For dealership 1 equation will be,
x + y = 164 ......(1)
For dealership 2 equation will be,
As the cars are sold twice and trucks are sold half .
2x + y/2 = 229......(2)
Solving 1 and 2,
y = 66
x = 98
Thus number of car sold are 98.
Thus number of trucks sold are 66.
Learn more about linear equation,
https://brainly.com/question/29111179
#SPJ1
PLEASE HELP ME
Sophie deposited money into an account in which interest is compounded
semiannually at a rate of 2.2%. She made no other deposits or withdrawals and the
total amount in her account after 13 years was $22,099.87. How much did she
deposit? Round answer to nearest whole number. Do not include units in the
answer. Be sure to attach your work for credit.
By using compound interest formula, we conclude that Sophie deposited $16,638 (rounded to the nearest whole number) into the account.
What is compound interest?Compound interest is a method of calculating interest on a principal amount of money, where the interest earned on the initial principal is added to the principal at the end of each compounding period (usually monthly, quarterly, or annually).
According to given information:We can use the formula for compound interest to solve this problem. The formula is:
\(A = P(1 + r/n)^{(nt)\)
Where:
A = the total amount in the account
P = the principal (initial deposit)
r = the annual interest rate (as a decimal)
n = the number of times the interest is compounded per year
t = the number of years
We know the values for A, r, n, and t, so we can solve for P:
\(A = P(1 + r/n)^{(nt)\)
\(22,099.87 = P(1 + 0.022/2)^{(2*13)\)
\(22,099.87 = P(1.011)^{26\)
22,099.87 = 1.329P
P = 22,099.87 / 1.329
P = 16,637.55
Therefore, Sophie deposited $16,638 (rounded to the nearest whole number) into the account.
To know more about compound interest visit:
https://brainly.com/question/3989769
#SPJ1
Calculate the value for the for the following scores 20, 60, 30, 50 given:
begin inline style begin display style sum for blank of end style end style x squared =
The sum of the scores is equal to 160.
What is a mean?In Mathematics, a mean is sometimes referred to as an average and it can be defined as a ratio of the sum of the total number in a data set (population) to the frequency of the data set.
How to calculate the mean for a data set?Mathematically, the mean for this set of scores can be calculated by using the following formula:
Mean = [F(x)]/n
For the total number of scores (data set), we have;
∑x = 20 + 60 + 30 + 50
∑x = 160.
Mean = [F(x)]/n = 160/4 = 40.
Read more on mean here: brainly.com/question/9550536
#SPJ1
Keller Construction is considering two new investments. Project E calls for the purchase of earthmoving equipment. Project H represents an investment in a hydraulic lift. Keller wishes to use a net present value profile in comparing the projects. The investment and cash flow patterns are as follows: Use Appendix B for an approximate answer but calculate your final answer using the formula and financial calculator methods.
Based on the net present value profile, Project H has a higher NPV than Project E.
To compare the net present value (NPV) of Project E and Project H, we need to calculate the present value of cash flows for each project and determine which one has a higher NPV. The cash flow patterns for the two projects are as follows:
Project E:
Initial investment: -$100,000
Cash flows for Year 1: $40,000
Cash flows for Year 2: $50,000
Cash flows for Year 3: $60,000
Project H:
Initial investment: -$120,000
Cash flows for Year 1: $60,000
Cash flows for Year 2: $50,000
Cash flows for Year 3: $40,000
To calculate the present value of cash flows, we need to discount them using an appropriate discount rate. The discount rate represents the required rate of return or the cost of capital for the company. Let's assume a discount rate of 10%.
Using the formula method, we can calculate the present value (PV) of each cash flow and sum them up to obtain the NPV for each project:
For Project E:
PV = $40,000/(1 + 0.10)^1 + $50,000/(1 + 0.10)^2 + $60,000/(1 + 0.10)^3
PV = $36,363.64 + $41,322.31 + $45,454.55
PV = $123,140.50
For Project H:
PV = $60,000/(1 + 0.10)^1 + $50,000/(1 + 0.10)^2 + $40,000/(1 + 0.10)^3
PV = $54,545.45 + $41,322.31 + $30,251.14
PV = $126,118.90
Using the financial calculator method, we can input the cash flows and the discount rate to calculate the NPV directly. By entering the cash flows for each project and the discount rate of 10%, we find that the NPV for Project E is approximately $123,140.50 and the NPV for Project H is approximately $126,118.90.
For more such questions on present value profile visit:
https://brainly.com/question/30390056
#SPJ8
A computer training institute has 625 students that are paying a course fee of $400. Their research shows that for every $20 reduction in the fee, they will attract another 50 students. Which equation could be used to represent this situation, where x is the course fee and R(x) is the total revenue?
R(x) = −2.5x2 + 1625x
R(x) = −3x2 + 1650x
R(x) = 3x2 − 1650x
R(x) = 2.5x2 − 1625x
The equation that could be used to represent this situation, where x is the course fee and R(x) is the total revenue, is: R(x) = 250000 + 375x - 2.5x²
What is an Equations?Equations are mathematical statements with two algebraic expressionsοn either sideοf an equals (=) sign. It illustrates the equality between the expressions writtenοn the left and right sides. To determine the valueοf a variable representing an unknown quantity, equations can be solved. A statement is not an equation if there is no "equal to" symbol in it. It will be regarded as an expression.
N(x) = 625 + 2.5x
The revenue R(x) will be the productοf the numberοf students enrolled and the fee charged per student. The fee charged per student will be (400 - x) dollars. So, the revenue function can be represented as:
R(x) = (625 + 2.5x)(400 - x)
Simplifying the expression, we get:
R(x) = 250000 + 375x - 2.5x²
Therefore, the equation that could be used to represent this situation, where x is the course fee and R(x) is the total revenue, is:
R(x) = 250000 + 375x - 2.5x²
Learn more about equations, by the following link
brainly.com/question/2972832
#SPJ1
A bag of equally sized rhinestones weighs 16 ounces. Each rhinestone weighs 0.016 ounce. If you have 2 bags of rhinestones, how many rhinestones do you have?
Honestly I’m so bad at geometry so helpppp:)
Answer:
900 m
Step-by-step explanation:
l*w*h
12 m (l)*5 m (w)*15 m (h)= 900 m altogether
9. LMNO is a rectangle. If LM = 16, MN = 12, and mZ1 = 53°, find the following:
Step-by-step explanation:
your question is in
complete
A coin collector has a bag full of coins. You ask the collector how many coins doe he have in his bag, he replied that he did not know, but he said when he tried to put them in the bag two at a time he had one left over at the end, and when he tried to stick them in the bag three at a time he also had one left over at the end. In fact, he said he had one left over then he put them in four, five and six at a time as well. When he stuck them in the seven at a time they all went in the bag evenly. How many coins must the collector have in his bag? The number of coins that the collector has is:
Answer:
301
Step-by-step explanation:
The answer is 301 because if I do the prime number theorem, I get 300+1 which is 301.
Hope this helps plz hit the crown:D
Write an equation in slope-intercept form of the line that passes through (-5, 5) and (5, - 5).
An equation is
Answer:
y=-5x+5
Step-by-step explanation: