Math
posted by anonymous on .
3.
What is 0.72 written as a simplified fraction? (1 point)
seventytwo over one hundred
one hundred over seventytwo
thirtysix over fifty
eighteen over twentyfive
4.
Ms. Johnson’s class is having a pizza party. If there are 14 students and 7 pizzas cut into 8 slices, what answer choice represents the fraction of one pizza that each student receives? (1 point)
onethird
onefourth
onehalf
oneeighth
5.
What makes the statement true? 8–2 = ? (1 point)
64
16
negative one over sixtyfour
one over sixtyfour
6.
Based upon the 2010 census data, the total population of the U.S. is 308,745,538 people. Approximately, what is this population in scientific notation? (1 point)
3.1 × 10^8
3.1 × 10^7
3.1 × 10^–8
31 × 10^7
7.
What is the solution to (3 × 102) x (5 × 105) written in scientific notation? (1 point)
1.5 × 10^8
15 × 10^8
1.5 × 10^7
15 × 10^7
8.
If there is onefourth of a pie, and Amy only wants two over three of it, how much of the pie does she want? (1 point)
onethird
onefourth
onefifth
onesixth
9.
Dory bought 2 computers on sale for $210.99 each. He sold them to his friend for $240.00 each. What was his profit? (1 point)
$52.99
$58.02
$421.98
$480.00
10.
What is 0.00000387 in scientific notation? (1 point)
0.387 × 10^–7
3.87 × 10^–6
3.87 × 10^6
387 × 10^–8
11.
What is thirtyone over four written as a decimal? (1 point)
6.75
7.50
7.75
8.25
12.
The table below shows the populations of four countries for the year 2006 expressed in scientific notation.
Population in 2006
Country Population
Lebanon 3.90 × 10^6
Mexico 1.08 × 10^8
Peru 2.84 × 10^7
Spain 45.5 × 10^6
Of the countries listed, which one had the largest population in 2006?
(1 point)
Lebanon
Mexico
Peru
Spain
13.
What is 2.28 × 10–8 in standard form? (1 point)
228,000,000
22,800,000
0.0000000228
0.000000228
14.
Which of the following appears to be an irrational number? (1 point)
0.404404440…
0.783783783…
negative four over fifteen
square root of thirtysix
15.
Which number is equivalent to 0.3? (1 point)
onethird
thirtythree over one hundred
fivesixths
twothirds
16.
Jessica went to the mall and used onesixth of her money on lunch. What is the fraction of her money expressed as a decimal? (1 point)
0.6
0.7
0.16
0.17
17.
Josh has fiveeighths of a foot of plywood. To finish building the deck, he needs five times that amount. How many feet of plywood does Josh need? (1 point)
3 feet
3 onehalf feet
3 oneeighth feet
3 twoninths feet
18.
negative tw thirds + ( negative thre tenths) = (1 point)
negative fivethirteenths
six over thirty
one over three
negative twentynine over thirty
19.
eleven over twelve + negative two over three= (1 point)
onefourth
thirteen over twelve
negative onesixth
–negative seventwelfths
20.
5onethird – three and foursevenths= (1 point)
two and three fourths
–two and three fourths
one and sixteen over twentyone
negative one and sixteen over twentyone
21.
onehalf • –onethird (1 point)
–1onesixth
negative twothirds
negative threeeighths
–onesixth
22.
seven over eight ÷ eleven over twelve = (1 point)
seventyseven over ninetysix
ninetenths
twentyone over twentytwo
twentytwo over twentyone
23.
A length of ribbon is three and onehalf yd long. How many pieces one and fiveninths yd long can Joy cut from the length of ribbon? (1 point)
1
2
3
4
24.
2two and sevenfifteenths ÷ 3three and twothirds = (1 point)
negative thirtyseven over fiftyfive
–81twofifths
–1negative one and eighteen over thirtyseven
–negative twentythree over fiftyfive
my answers
3.d
4.b?
5.a
6.b
7.b
8.a
9.b
10.a
11.c
12.b
13.d
14.a
15.a
16.c
17.c
18.?
19.a
20.a
21.d
22.d
23.b
24.a
Ms. Sue please help!

#4. c
14 students, 7 pizzas. Doesn't matter how many slices they use.
#5. Not sure, since you botched the exponent. However,
8^2 = 64
8^2 = 1/64
#6. (a) There are 8 decimal places after the 3.
#7 (a)
3*10^2 x 5*10^5 = 15*10^7 = 1.5*10^8
#8. (d)
1/4 * 2/3 = 2/12 = 1/6
#10. (b)
.387 = 3.87*10^1
shift left 5 more places and you have 3.87*10^6
#13. (c)
#15,16 correct, if the final digit repeats.
#18. (d)
#20. (c)
5 1/3  3 4/7 = 16/3  25/7 = 112/21  75/21 = 37/21 = 1 16/21
#22. (c)
7/8 * 12/11 = 84/88 = 21/22
The rest look correct.
Looks like you need to review some more, especially scientific notation.
Plus, what's all the nonsense with words? Real people use digits when talking about numbers. That, and the typos made it hard going.
2/3  3/10 = (2/3 + 3/10) = (20/20 + 9/30) = 29/30 
i know Steve it's really weird that my questions are like this but they are.
thanks for helping man. 
hey Steve can you help me with this question also?
A certain computer can perform 10^5 calculations per second. How many calculations can it perform in 10 seconds? (3 points)
10,000,000? 
sorry meant 1,000,000

Why do you multiply to find the answer to question 8? I also got #8 wrong because I didn't know how to solve it. Can you explain it or tell me where to look to find the right way of completing the problem?

you were wrong on most of them

I have a quick qouestion too. Please!!
0.000027/0.000009 how can i show the steps to show it in simplest form? 
divide 27 by 9 duh

hey you cheat!

I need help with math