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LiRa [457]
3 years ago
14

Which ratios form a proportion?

Mathematics
2 answers:
Furkat [3]3 years ago
4 0
Well im going to say the answer is C, and here's why:

Because 2 out of 3 as a percent is 66.6%, and 8 out of 12 as a percent is 66.6% also.

I say A is wrong because the proportions are out of whack because one goes over a hundred. B is wrong because, 1 out of 6 as a percent is 16.6% and 3 out of 8 as a percent is 37.5 . And D is wrong because 3 out of 4 as a percent is 75% and  9 out of 16 as a percent is 56%. So none of them give you an equal amount besides C.
svetoff [14.1K]3 years ago
3 0
C, 2/3 and 8/12 is the answer.
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Ignore #11 and #13; just need help with #12. TYSM (18 point question)
zimovet [89]

Answer:

22.5°

Step-by-step explanation:

it's a right angle which equals 90°

which is 4 times as much as x

so i just divided 90 by 4

however since you are using formulas it would be written

90 ÷ 4 = x

3 0
3 years ago
What is the length of arc S shown below? Enter an exact expression.
aleksandrvk [35]

Answer:

S = 15π = 47.12

length of arc S = 15π

Attached is the image of the arc.

Step-by-step explanation:

Given;

Radius arc r = 10

Angle at the center of arc ⍉ = 3π/2

The length of the arc S can be derived using the formula;

S = r × ⍉

Substituting the values;

S = 10 × 3π/2

S = 30π/2

S = 15π =  47.12

length of arc S = 15π

6 0
3 years ago
Question 3 of 10
7nadin3 [17]

Answer:

F

Step-by-step explanation:

7 0
3 years ago
Michael saves $423 dollars a month for college.
alexandr1967 [171]

Answer:

(a). $20,000

(b). The estimate will be lower than the actual amount.

Step-by-step explanation:

We have been given that Michael saves $423 dollars a month for college.

(a). We know that 1 year equals 12 months.

4 years = 4*12 months = 48 months.

\text{Actual amount saved}=\$423\times 48

Since we are asked to find the estimated amount of money Michael will save in 4 years, so we will estimate both quantities as:

423\approx 400\\\\48\approx 50

\text{Actual amount saved}=\$400\times 50

\text{Actual amount saved}=\$20,000

Therefore, Michael will save approximately $20,000 in 4 years.

(b).

The estimate will be lower than the actual amount as we rounded $423 down $23 to nearest hundred that is $400 and rounded 48 up 2 to nearest ten that is 40.

Therefore, the estimate will be lower than the actual amount.

5 0
3 years ago
38. The volume of a cylinder is 97 ft3. If the dimensions are doubled, what will be the new volume?
asambeis [7]

Volume is cubed. If the dimensions are doubled, cube the scale factor:

2^3 = 8

The volume will increase by a scale of 8.

The new volume would be 97 x 8 = 776 ft^3

8 0
3 years ago
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