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gavmur [86]
2 years ago
7

Given: ΔXYZ

Mathematics
1 answer:
denis23 [38]2 years ago
3 0
Since we don’t have enough information in the problem, I would say d would be the best choice to pick.
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about 70,000 people live in a circular region with a 30-mile radius. find the population density in people per square mile.
bezimeni [28]

Solve for the area of the circular region first:

A = pi*r^2

A = pi*(30 mi)^2

A = 2827.43 mi^2

Density = 70000 people/2827.43 mi^2

Density = 24.76 = 25 people/mi^2 <--ANSWER Plz vote brainnliest


4 0
2 years ago
A digital camcorder repair service has set a goal not to exceed an average of 5 working days from the time the unit is brought i
garri49 [273]

Answer:

The degrees of freedom first given by:  

df=n-1=12-1=11  

Then we can find the critical value taking in count the degrees of freedom and the alternative hypothesis and then we need to find a critical value who accumulates 0.05 of the area in the right tail and we got:

t_{\alpha}= 1.796

And for this case the rejection region would be:

b) Reject H0 if tcalc >1.7960

Step-by-step explanation:

Information given

5, 7, 4, 6, 7, 5, 5, 6, 4, 4, 7, 5.

System of hypothesis

We want to test if the true mean is higher than 5, the system of hypothesis are :  

Null hypothesis:\mu \leq 5  

Alternative hypothesis:\mu > 5  

The statistic is given by:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)  

The degrees of freedom first given by:  

df=n-1=12-1=11  

Then we can find the critical value taking in count the degrees of freedom and the alternative hypothesis and then we need to find a critical value who accumulates 0.05 of the area in the right tail and we got:

t_{\alpha}= 1.796

And for this case the rejection region would be:

b) Reject H0 if tcalc >1.7960

6 0
3 years ago
Mr. Kramer's patio is in the shape of a trapezoid. The trapezoid and its dimensions are shown below. What is the area of the pat
BigorU [14]

Answer:

C 315

Step-by-step explanation:

(12 + 30) * 15/2 = 315

5 0
2 years ago
The function f(t) = 180(1.01) 6 represents the change in a quantity over i years.
lesya692 [45]

Step-by-step explanation:

3 divide 180 230 7 c=mc square that eaquls 2

8 0
2 years ago
During a certain day, a worker made 81 parts. He usually does 45 parts per day. What was the percent by which he increased the n
SIZIF [17.4K]
45/81 = .55
Turn this into a percent: .55 x 100
55 percent
Hope this helps!
6 0
2 years ago
Read 2 more answers
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