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Kruka [31]
3 years ago
8

Is my answer correct?

Mathematics
1 answer:
scZoUnD [109]3 years ago
5 0

Answer:

yes $56 is correct

Step-by-step explanation:

The 3 part of the ratio relates to $42 , then

$42 ÷ 3 = $14 ← value of 1 part of the ratio , then

4 parts = 4 × $14 = $56

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Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that
timama [110]

Answer:

Step-by-step explanation:

Given that evolution theory hypothesizes that people should spontaneously follow a​ 24-hour cycle of sleeping and wakingdash–even if they are not exposed to the usual pattern of sunlight.

Sample size n = 8

df = 8- 1=7

Since population std deviation is not known, and sample size is small we can use only t test

H-0: x bar = 24\\H_a: x bar \neq 24

(two tailed test at 5% level of significance)

24

28

24

22

25

26

26

25

 

mean 25

 

sd 3.142857143

 

se 1.111167799

Test statistic = Mean diff/se = 1.595

p = 0.1546

since p >0.05, accept null hypothesis.

There is no evidence to prove that the steady cycle is different from 24 hours.

4 0
3 years ago
The radius of a sphere is increasing at a rate of 5 mm/s. How fast is the volume increasing (in mm3/s) when the diameter is 40 m
jeka94

9514 1404 393

Answer:

  8000π mm^3/s ≈ 25,133 mm^3/s

Step-by-step explanation:

The rate of change of volume is found by differentiating the volume formula with respect to time.

  V = 4/3πr^3

  V' = 4πr^2·r'

For the given numbers, this is ...

  V' = 4π(20 mm)^2·(5 mm/s) = 8000π mm^3/s ≈ 25,133 mm^3/s

_____

<em>Additional comment</em>

By comparing the derivative to the area formula for a sphere, you see that the rate of change of volume is the product of the area and the rate of change of radius. This sort of relationship will be seen for a number of different shapes.

4 0
3 years ago
The area of a parallelogram is 125 square inches and the height of the parallelogram is 10 inches. What is the lenght of the bas
kipiarov [429]

Answer:

12.5 inches is the correct answer.

Step-by-step explanation:

I can bet you with brainliest post if it is correct mark me brainliest and wrong then spam me(;

6 0
3 years ago
How did they get the answer 30 for this equation? √2 × √15 = ?
dolphi86 [110]

Answer:

wrong answer.

Right answer: √30 ≈ 5.48

Step-by-step explanation:

The answer for √2 × √15 is not 30, that answer is wrong

√2 × √15 = √2*15 = √30 ≈ 5.48

Hope this help you :3

3 0
3 years ago
A shirt purchased for $20. The store owner will sell it for a 40% mark up. What will the new price be?
Kazeer [188]
40%=0.4

0.4(20)
8(markup)

Shirt price=$20+ $8


New price=$28
3 0
2 years ago
Read 2 more answers
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