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Nookie1986 [14]
3 years ago
11

Can someone help me with my little brothers HW lol

Mathematics
1 answer:
VladimirAG [237]3 years ago
6 0
Find how much Neil traveled.

Since 20 minutes is a 1/3 of an hour, we need to find a 1/3 of 45 kilometers.

45/3= 15

So, Neil drove 15 kilometers.

Stephen was driving at 30 kilometers an hour. 

30/2= 15

Stephen traveled for half an hour or thirty minutes. 

I hope this helps!
~kaikers
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Anvisha [2.4K]
The first one is A and the second one is A
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3 years ago
A right triangle has a side with length 12 in and a hypotenuse with length 20 in. find the length of the missing leg. (round to
OLEGan [10]
Let the unknown side be "z" inches
Through pythagoras:
{12}^{2}  +  {z}^{2}  =  {20}^{2}
Because the square of the two sides add up to the square of the hypotenuse in a right triangle.

This means that
{z }^{2}  = {20}^{2}  -  {12}^{2}
{z}^{2}  = 400 - 144 = 256
z =  \sqrt{256}  = 16
So the missing side is 16 inches

Hope this helped
6 0
4 years ago
A number greater than 18.55 and less than 18.6
yuradex [85]
18.56, 18.57, 18.58 or 18.59?
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3 years ago
Read 2 more answers
Suppose that the hourly wages of fast food workers are normally distributed with an unknown mean and standard deviation. The wag
Nutka1998 [239]

Answer: 1.303639

Step-by-step explanation:

The t-score for a level of confidence (1-\alpha) is given by :_

t_{(df,\alpha/2)}, where df is the degree of freedom and \alpha is the significance level.

Given : Level of significance : 1-\alpha:0.80

Then , significance level : \alpha: 1-0.80=0.20

Sample size : n=40

Then , the degree of freedom for t-distribution: df=n-1=40-1=39

Using the normal t-distribution table, we have

t_{(df,\alpha/2)}=t_{39,0.10}=1.303639

Thus, the t-score should be used to find the 80% confidence interval for the population mean =1.303639

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3 years ago
Liz train for rock climbing 4 days a week
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7 times 4 =28 this is cuz there is seven days in a week and 7x4
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