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3 years ago

Please help me !!!!!!!!

Mathematics

1 answer:

MissTica3 years ago

5 0

Answer:sorry eu

Step-by-step explanation:não falo inglês

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A large school district has 300 buses. if each school bus is used 3.0 hours each day, the average speed of the school buses is 1

insens350 [35]

step 1

Find the number of miles run by each bus in one day

we know that

speed=distance/time

distance=speed*time

distance=(15 mi/h)*3 h=45 miles

Find the number of miles run by the total buses in one day

Multiply by 300

300*45=13,500 miles

Find the number of miles run by the total buses in 22 days

13,500*22=297,000 miles

step 2

Find the number of gallons to run 297,000 miles

we know that

the fuel economy of the buses is 10 mi/gal

by proportion

$\frac{10}{1} \frac{miles}{gal}= \frac{297,000}{x} \frac{miles}{gal} \\ \\10*x=297,000 \\ \\x=29,700\ gal$

step 3

Find the cost of 29,700 gal of gasoline

we know that

the gasoline costs $4.10 per gallon

then

29,700*4.10=$121,770

therefore

the answer is

the cost of the gasoline is $121,770

3 0

3 years ago

Jill has a 25% off coupon for some computer software. If the coupon saved her $35, how much would the software cost without the

zysi [14]

Answer:

$140

Step-by-step explanation:

35 times 4

6 0

3 years ago

Can someone answer number 3 and 4 for me please? :))

liraira [26]

Answer:

3. Yes, because 160 / 4 = 40 and 120 / 3 = 40.

4. 10, because 24 / 12 = 2 and 20 / 2 = 10

3 0

3 years ago

Read 2 more answers

Home Videos Inc. surveys 450 households and finds that the mean amount spent for renting or buying videos is P135 a month and th

adell [148]

SOLUTION:

Case: Hypothesis testing

Step 1: Null and Alternative hypotheses

$\begin{gathered} H_0:\mu=P127.50 \\ H_1:\mu\leq P127.50 \end{gathered}$

Step 2: T-test analysis

$\begin{gathered} t=\frac{\hat{x}-\mu}{\frac{s}{\sqrt{n}}} \\ t=\frac{135-127.5}{\frac{75.25}{\sqrt{450}}} \\ t=2.144 \end{gathered}$

Step 3: t-test with the significance level

$\begin{gathered} t_{\alpha}=? \\ \alpha=0.05 \\ From\text{ }tables \\ t_{0.05}=1.654 \end{gathered}$

Step 4: Comparing

$t>t_{\alpha}$

So tail to reject the null hypothesis. There is enough evidence at a 0.05 level of significance to claim that the mean spent is greater than P127.50.

Final answer:

Yes, there is evidence sufficient to conclude that the mean amount spent is greater than P127.50 per month at a 0.05 level of significance.

6 0

1 year ago

How in the world do i do this? please explain.

jeka94

Answer: 62.83in

Step-by-step explanation:

C= 2(3.14)(10)

C= 20(3.14)

C= 62.831853071796

7 0

2 years ago