Answer:
B
Step-by-step explanation:
We start with 16 grams of water
At the end of the first hour , we decreased by 3.5%
We take the amount and multiply by the percent decreased. Then subtract that from the original amount
16*3.5% =
16*.035 =.56
16-.56 = 15.44
At the end of the second hour , we decreased by 4.25%
We take the amount and multiply by the percent decreased. Then subtract that from the amount we started with at hour 2
15.44 *4.25%
15.44 *.0425=.6562
15.44-.6562=14.788
Answer:
B.
Step-by-step explanation:
So there are 16 grams initally. Then, the amount of water decreases by 3.5%.
So first we must find 3.5% of 16. 3.5% in decimal form is 0.035, since you divide 3.5 by 100. Then, when you multiply 0.035 by 16, you get 0.56. Since the solution decreased by that percentage, you must subtract 0.56 from 16, which is 15.44.
Then the amount of water decreases by 4.25%. That in decimal form is 0.0425. You multiply it by 15.44, and it comes out to 0.6562. You subtract that from 15.44, not 16, since some of the water has evaporated. So you get 14.7838.
Answer:
Probbly -9 degrees Fahrenheit
Step-by-step explanation:
There are 4 quarts in one gallon:
1 gal = 4 qt
Then, we want to find the number of quarts in 19 gallons. We can write a proportion:
1/4 = 19/x
Cross multiply:
x = 76 quarts.
There are 76 quarts in 19 gallons.
76 quarts in 19 gallons
9x − 3y = 21
A. Multiply the first equation by 3 and the second equation by 4.
B. Multiply the first equation by 4 and the second equation by 3.
C. Multiply the first equation by 3 and the second equation by 9.
D. Multiply the first equation by 9 and the second equation by 4.
E. Multiply the second equation by 9.
F. Multiply the first equation by 9.
Answer:
A
Step-by-step explanation:
The answer is A nd i'm 100% sure