To clean a tank, 3/4 cup of disinfectant is needed for every 2 gallons of water. How many cups of disinfectant are needed for 20 gallons of water?A. 7 1/2
B. 15
C. 22 1/2
D. 30

Answers

Answer 1

Answer: Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship. For example, “This recipe has a ratio of 3 cups of flour to 4 cups of sugar, so there is 3/4 cup of flour for each cup of gallons of water.”How many cups of disinfectant are needed for 20 gallons of water so c is

Answer 2

Answer: I use ratio and proportionchanges 3/4= .75.75 cups/2 gallons= x cups/2o gallonscross multiply2x= 15x= 7 1/2 cupsalso there are 10 gallons for every 3/4 cup10 x 3/4= 30/4= 7 1/2I like ratio and proportion it's more consistent in solving lots of problemshope this helps

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10% of what number is 30

Answers

'is' in mathematics means equal
'of' in mathematics means multiplication

10% can also be written as 10/100

$(10)/(100) * x = 30\n\n(1)/(10)x = 30\n\n\boxed{\bf{x=300}}$

10% of 300 is 30

Convert percentage into decimal: 10%/100 = 0.1
Divide decimal by 30: 30 ÷ 0.1 = 300

Which equation shows the quadratic formula used correctly to solve 5x2 + 3x – 4 = 0 for x?

Answers

I hope this helps you

Answer:

The answer is A on edge for those who just want the letter

Step-by-step explanation:

How do i solve 10 + -3 without doing that much work?

Answers

Answer: instead of 10 + -3 think of it as 10 - 3. If you see a plus sign and a negative then just change it to subtraction

Step-by-step explanation:

10 + -3

10 - 3

A student spins a spinner and rolls a number cube. Is that independent or dependent

Answers

Independent because the outcome of the spin does not affect the outcome of the number cube and vice versa.

suppose you invest 1050 at an annual interest rate of 5.5% compounded continuously. How much will you have in the account after 5 years? round the solution to the nearest dollar. HELP please

Answers

For an investment with an interest rate compounded continuously, the formula would be

F = Pe^(rn), where r is the annual interest rate and n is the number of years.
F = 1050e^(0.055*5)
F = $1382.36

I hope I was able to answer your question.

Answer: $1372

Step-by-step explanation:

The formula to calculate the compound amount is given by :-

$A=P(1+r)^t$ , where P is principal amount, r is rate of interest and t is time.

Given: P = $1050

r=5.5%=0.055

t= 5 years

Now, the compound amount after 5 years will be :_

$A=1050(1+0.055)^5\n\n\Rightarrow\ A=\$1372.30800673\approx\$1372$

You will have $1372 in the account after 5 years.

A cylindrical well is 20 meters deep and has a diameter of 1.5 meters. Approximately how many cubic meters of soil were dug out to make the well? (Use π = 3.14.)11.78 cubic meters
35.33 cubic meters
121.20 cubic meters
141.30 cubic meters