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zhannawk [14.2K]

3 years ago

6

Allen is putting weed killer on the field to get ready for planting the directions say on the container to use it for fifth of a

quart for each acre of land how much weed killer will Allen need for two fields one that is 22 1/2 acres and one that is 38 1/4 acres

1 answer:

ch4aika [34]3 years ago

5 0

Answer:

6

Step-by-step explanation:

becuz the variable

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A country is considering raising the speed limit on a road because they claim that the mean speed of vehicles is greater than 30

kondaur [170]

Answer:

We conclude that speed is greater than 30 miles per hour.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 30 miles per hour

Sample mean, $\bar{x}$ = 35 miles per hour

Sample size, n = 15

Alpha, α = 0.01

Sample standard deviation, s = 4.7 miles per hour

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 30\text{ miles per hour}\\H_A: \mu > 30\text{ miles per hour}$

We use one-tailed(right) t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{35 - 30}{\frac{4.7}{\sqrt{15}} } = 4.120$

Now, $t_{critical} \text{ at 0.01 level of significance, 14 degree of freedom } = 2.624$

Since,

$t_{stat} > t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis and conclude that speed is greater than 30 miles per hour.

We calculate the p-value.

P-value = 0.00052

Since p value is lower than the significance level, we reject the null hypothesis and accept the alternate hypothesis. We conclude that speed is greater than 30 miles per hour.

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3 years ago

Harry earns $45 a week more than Xena. George earns $18 a week less than Xena. If Harry earns the same amount in two weeks that

12345 [234]

Answer:

Xena earns $144 per a week.

Step-by-step explanation:

Harry earns - $ h

Xena earns - $ x

George earns -$ g

Harry earns $45 a week more than Xena. h= x+45

George earns $18 a week less than Xena. g = x - 18

If Harry earns the same amount in two weeks that George earns in three weeks

2h = 3g

So, we have the system of 3 equations:

h= x+45

g = x - 18

2h = 3g (*)

Substitute values of h and g into equation (*)

2(x+45) = 3(x-18)

2x + 90 = 3x - 54

90+54 = 3x- 2x

x= 144

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3 years ago

How can you use exponents to write 10,000,000?

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Let's break it down into something more simple:

What's 10 times 10? 100

What's 10 times 10 times 10? 1000

Do you see a pattern? (Cool trick - The number of 10s match the number of 0s in the answer)

We have seven 0s in our answer, so let's check:

10 x 10 x 10 x 10 x 10 x 10 x 10 = 10,000,000

An exponent tells us that we're multiplying the big number by itself however many times the little number in the corner tells us.

So if we multiply 10 by itself 7 times (what we did above), then our answer will be 10 to the power of 7, or $10^{7}$ . This is equal to 10,000,000.

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Answer:

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Step-by-step explanation:

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