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alina1380 [7]
3 years ago
11

Help help help math math

Mathematics
2 answers:
Jlenok [28]3 years ago
5 0

Answer:

volume of sphere is 4000cubic ft..... when

\pi = 3 \: and \: r =  \frac{1}{2} d

Vlada [557]3 years ago
4 0

Answer:

   

Step-by-step explanation:

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Help? any one can ear brailest
Vitek1552 [10]

Answer: I think best answer for this equation is A

Step-by-step explanation:but just to be exactly sure I suggest using homeworkla .org just to be sure, but I'm positive it's A.

hope this helps :3

8 0
3 years ago
A class has 14 girls and 12 boys. What is the probability that a girl's name is drawn at random?
Otrada [13]
14 over 26. Because if you want to find out the probability, you need to put the number of girls over the total of students.
Hope this helps!!!:)
6 0
3 years ago
Read 2 more answers
Female athletes at the University of Colorado, Boulder, have a long-term graduation rate of 67% (Source: Chronicle of Higher Edu
VLD [36.1K]

Answer:

Yes, we can assume that the percent of female athletes graduating from the University of Colorado is less than 67%.

Step-by-step explanation:

We need to find p-value first:

z statistic = (p⁻ - p0) / √[p0 x (1 - p0) / n]

p⁻ = X / n = 21 / 38 = 0.5526316

the alternate hypothesis states that p-value must be under the normal curve, i.e. the percent of female athletes graduating remains at 67% 

H1: p < 0.67 

z = (0.5526316 - 0.67) / √[0.67 x (1 - 0.67) / 38] = -0.1173684 / 0.076278575

z = -1.538681 

using a p-value calculator for  z = -1.538681, confidence level of 5%

p-value = .062024, not significant

Since p-value is not significant, we must reject the alternate hypothesis and retain the null hypothesis.

3 0
3 years ago
What expression can be used for estimating 868÷29?
Lelu [443]
One expression u can use is 900÷30
Round 868 up to 900
and round 29 up is 30
4 0
3 years ago
19. Heather invests $4,900 in an account with a 3.5% interest rate, making no other deposits or withdrawals. What will Heather’s
denis-greek [22]

Answer:

\$5,828.28

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

A=P(1+\frac{r}{n})^{nt}  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest  in decimal

t is Number of Time Periods  

n is the number of times interest is compounded per year

in this problem we have  

t=5\ years\\ P=\$4,900\\ r=0.035\\n=2  

substitute in the formula above  

A=\$4,900(1+\frac{0.035}{2})^{2*5}  

A=\$4,900(1.0175)^{10}=\$5,828.28

5 0
3 years ago
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