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3 years ago

Find the unit rate: $3.60 for 3 pounds of apples. How much does it cost for 1 pound of apples?

Mathematics

1 answer:

andre [41]3 years ago

8 0

Answer:

$1.2 per pound

Step-by-step explanation:

3.60 is the amount for THREE pounds, If you want ONE pound you would have to divide 3.6 by 3. And the number is 1.2

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I need desperate help PLEASE!!!

koban [17]

Answer:

OPTION B

OPTION D

Step-by-step explanation:

An element in the domain should be mapped to exactly one element on the co-domain. Also, every element in the domain should be mapped to an element in the co-domain.

These two conditions are satisfied to call a relation, a function.

Two different elements in the domain can be mapped to the same element in the co-domain. But the same element in the domain cannot be mapped to two different elements in the co-domain.

A) {(3,7), (3,6), (5,4), (4,7)}

Here, the element '3' in the domain is mapped to two elements 7 and 6. So, it is not a function.

B) {(1,5), (3,5), (4, 6), (6,4)}

This is a function because all the elements in the domain have a unique image in the co-domain. So, this is a function.

C) {(2,3), (4,2), (4,6), (6,4)}

Here, the element '4' in the domain is again mapped to two different elements. Hence, it cannot be a function.

D) {(0,4), (3,2), (4,2), (6,5)}

This is again a function. Because the domain is mapped to unique elements. So, this is a function.

4 0

3 years ago

Solve the logarithmic equation. be sure to reject any value that is not in the domain of the original logarithmic expressions. g

Dovator [93]

This is the answer: false, because the domain is incorrect

3 0

3 years ago

Solve the inequality

krok68 [10]

4b <= - 3
b <= -3/4

answer is A
b <= -3/4

7 0

3 years ago

Steven gets a weekly allowance of $14. He spends $2 each week on treats for his little sister.

Aloiza [94]

Answer:

Step-by-step explanation:

First, you have to subtract 2 dollars for his sister.

Then, you are left with 12 dollars. If he splits it equally into three groups, then the answer is 4, as you divide 12/3

8 0

3 years ago

The estimate of the population proportion should be within plus or minus 0.02, with a 90% level of confidence. The best estimate

Rudiy27

Answer:

The sample size required is 910.

Step-by-step explanation:

The confidence interval for population proportion is:

$CI=\hat p\pm z_{ \alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n} }$

The margin of error is:

$MOE=z_{ \alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n} }$

Given:

$\hat p = 0.16\\MOE= 0.02\\Confidence\ level =0.90$

The critical value of <em>z</em> for 90% confidence level is:

$z_{\alpha /2}=z_{0.10/2}=z_{0.05}=1.645$ *Use a standard normal table.

Compute the sample size required as follows:

$MOE=z_{ \alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n} }\\0.02=1.645\times \sqrt{\frac{0.16(1-0.16)}{n} }\\n=\frac{(1.645)^{2}\times 0.16\times (1-0.16)}{(0.02)^{2}} \\=909.2244\\\approx910$

Thus, the sample size required is 910.

5 0

4 years ago