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8090 [49]
3 years ago
9

You are 55 feet tall and cast a 1010-foot shadow. A flagpole nearby casts a shadow that is 2828 feet. Which equation can you use

to solve for the height (h)h of the flagpole?
A. 10/5 = h/28

B. 5/10 = h/28

C. 5/28 = h/10

D. 5/10 = 28/h
Mathematics
1 answer:
sergejj [24]3 years ago
4 0
B. 5/10 = h/28
This is because 10 and 28 is simplified versions of 1010 and 2828, which are both the shadows, and they both either have to be on the top of the bottom, and 5 is a simplified version of 55 and 55 and 1010 have to go together
Hope this helps
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A total of $12,000 is invested at two different rates: $5,000 of it is invested at 6%, and the rest is invested at 8%. How much
lesantik [10]
5000*6/100=300
7000*8/100=560
total=860

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3 years ago
If x2 + y2=6 , xy = 5 , then (X + y)2? <br><br><br><br>​
VARVARA [1.3K]

Answer:

(x + y)² =16

Step-by-step explanation:

hello :

(x + y)² = x²+y²+2xy   and : x²+y² = 6     xy = 5

(x + y)² = 6+2(5)

(x + y)² =16    

3 0
2 years ago
Pls help i need a good grade​
xenn [34]

Step-by-step explanation:

1\5 ÷3/7=7/15

3/7 multiply by 7/15=1/5

4 0
3 years ago
An investigator thinks that people under the age of forty have vocabularies that are different than those of people over sixty y
Kay [80]

Answer:

t=\frac{(14-20)-0}{\sqrt{\frac{5^2}{31}+\frac{6^2}{31}}}}=-4.28  

Now we can calculate the p value with the following probability:

p_v =2*P(t_{60}  

The p value is a very low value so then we have enough evidence to reject the null hypothesis and we can conclude that people under the age of forty have vocabularies that are different than those of people over sixty years of age.

Step-by-step explanation:

Information given

\bar X_{1}=14 represent the mean for sample 1 (younger)

\bar X_{2}=20 represent the mean for sample 2 (older)  

s_{1}=5 represent the sample standard deviation for 1  

s_{f}=6 represent the sample standard deviation for 2  

n_{1}=31 sample size for the group 2  

n_{2}=31 sample size for the group 2  

t would represent the statistic

System of hypothesis

We want to test if  that people under the age of forty have vocabularies that are different than those of people over sixty years of age, the system of hypothesis are:

Null hypothesis:\mu_{1}-\mu_{2}=0  

Alternative hypothesis:\mu_{1} - \mu_{2}\neq 0  

The statistic is given by:

t=\frac{(\bar X_{1}-\bar X_{2})-\Delta}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}} (1)  

And the degrees of freedom are given by df=n_1 +n_2 -2=31+31-2=60  

Replacing the info given we got:

t=\frac{(14-20)-0}{\sqrt{\frac{5^2}{31}+\frac{6^2}{31}}}}=-4.28  

Now we can calculate the p value with the following probability:

p_v =2*P(t_{60}  

The p value is a very low value so then we have enough evidence to reject the null hypothesis and we can conclude that people under the age of forty have vocabularies that are different than those of people over sixty years of age.

6 0
3 years ago
Please help me idk this
Natali [406]

Answer:9000

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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