math check please
posted by tony .
Approximately 4 out of every 10 students at Sonia's college live on campus. The college has 3,000 students. 1. How many of them live on campus?
A 1,200 students
2. Write the proportion 21 is to 33 as 63 is to 99.
A. 21/33 =63/99
3. is this fraction proportional?
3/11=7/19
A. no
4. Find the best buy on pasta sauce ( 1 qt is 32 oz).
(A) 48 oz for $1.79
(B) 1 qt for $1.29
(C)1 qt 16 oz for $1.99
(D)45 oz for $1.59
my answer was was D if I rounded them off they would average to .04 D was smallest going 4 digits it was .0353
5.Find the rate 392ft./8sec.
A 49 ft/sec
6.Is this rate rates are equivalent?
48 U.S. dollars/ 64 Canadian Dollars = 72 U.S. dollars / 96 canadian dollars
A Yes
7. Solve for the unknown: 4/x =12/15
x = 5
all are correct.Good work.
1.A caterer made 150 sandwiches for 120 people. How many sandwiches are there for each person? A 1.25 or 1 1/4 sandwich/person
2.On the blueprint of Lauren's new office building, the scale is 3 in. equals 8 ft. What will be the actual length of Lauren's office if it measures 6 in. long on the blueprint?
a. 16ft.
3.Write 0.21 as a percent.
A. 21%
4. 1,155 is what percent of 210?
A. 550%
5. The electricity costs of a business increased from $18,000 one year to $19,000 the next. To the nearest whole percent, what was the rate of increase?
A. 6%
6. Rewrite the statement, using percent notation.
7. 13 out of 25 college students work at parttime jobs.
A. 52% of college students work a part time jobs
8. Write 2 1/4 as a percent.
A. 225%
9. Write 20% as a fraction or a mixed number.
A. 1/5
10.A saleswoman is working on a 6% commission basis. If she wants to make $2,400 in one month, how much must she sell?
A. $40,000
a caterer made 150 sandwiches for 120 people. how many sandwiches are there for each person?

If $3,000.00 is deposited into an account paying 4% interest compounded annually (at the end of each year), how much money is in the account after 3 years? (Round to the nearest cent.)

3,360.00

could you show how you figured out the answer for how many students lived on campus

The electricity costs of a business decreased from $16,000 one year to $11,000 the next. To the nearest whole percent, what was the rate of decrease?

$3,000 x 0.04= 120
$3,000 + 120 = $3,120 is the answer. 
Approximately 4 out of every 10 students at Sonia's college live on campus. The college has 3,000 students. How many of them live on campus?

20 is what percent of 210%

57/54 = c/18
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