Please help with these math questions part 1

Answers

Answer 1

Answer: volume of sphere=(4/3)pir^3

leave in terms of pi

1.
r=6.5
A=(4/3)(pi)(6.5^3)
A=(4/3)(pi)(274.625)
A=(366.166666)pi ft^3

answer is C (you are correct)

2. ok so it seems from last question that we round final answer to tenths place

ok so remember
d/2=r
18=d
18/2=9=r
A=(4/3)(pi)(9^3)
A=(4/3)(pi)(729)
A=972pi cm^3

put in 972 in blank (you are correct again)

3. aprox pi=3.14 for this question

r=3
A=(4/3)(3.14)(3^3)
A=(4/3)(3.14)(27)
A=(36)(3.14)
A=113.04 in^3

answer is C

ANSWERS

1. C
2. 972
3. C

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Which expression is equivalent to the given expression?3(2a + 5)

11a

6a + 15

6a + 5

21a

Answers

3(2a + 5) = 3 * 2a + 3 * 5 = 6a + 15

the answer is 6a + 15

How many dimes are $68

Answers

Since there are 10 dimes in a dollar, and there are 68 dollars, you multiply 10 and 68. You should get 680 dimes in $68

6 dimes but you need change to make 68. You could use a nickel and and 3 pennies. Hope this helps and plz mark brainliest.

Suppose a population has a doubling time of 25 years. By what factor will it grow in 25 years? 50 years? In 100 years?

Answers

Answer:

2,4, and 8.

Step-by-step explanation:

If the population has a doubling time of 25 years, that means that in 25 years the population will double. So for 25 years, the factor will be 2. For 50 years, the factor would be 2x2, which is 4. For 100 years, it is 4x2 which is a scale factor of 8.

Which equation can be used to find the volume of this solid?

Answers

Answer:

Option A, V = 3 * 5 * 4

Step-by-step explanation:

Volume of a Cube formula: V = w*h*l

Step 1: Plug in

V = whl

V = (5)(4)(3)

Answer: Option A, V = 3 * 5 * 4

V= 3 x 5 x 4
The equation for volume is length x width x height (which sides are length/width/height doesn't matter)

Josh buys cucumbers that cost $0.62 per pound.He pays $2.79 for the cucumbers.Part A
Josh estimates he bought 5 pounds of cucumbers.Is Josh's estimate reasonable? Explain.
Part B
How many pounds of cucumbers did Josh actually buy? Show your work.

Answers

Please refer to the other post you saw.

Josh's estimate IS reasonable because when you have a number 5 or above after the decimal, you round up. Although it's reasonable to round up to 5 pounds, the actual amount is 4.5 pounds, or four and a half.

Which options could be the next step in simplifying this expression?27 + (3 + 41)

Choose exactly two answers that are correct.

A.

27 + 44 (use order of operations)

B.

30 + 68 (use the distributive property)

C.

30 + 41 (use the associative property)

D.

68 + 30 (use the commutative property

Answers

The correct answer is A and C. In PEMDAS, parenthesis are the first things that need to be simplified. And the associative property states a (b + c) = (a + b) + c. And you can also add up the numbers in the answer choice to make sure :)

$Associative\ property:a+(b+c)=(a+b)+c\n\n27+(3+41)=(27+3)+41=30+41=71\leftarrow\boxed{C}$