Friday

August 22, 2014

August 22, 2014

Posted by **josh** on Wednesday, October 30, 2013 at 3:25am.

1. What is 0.32 written as a fraction in simplest form? (1 point)

thirty-two over one hundred

eight over twenty-five

one hundred over thirty-two

sixteen over twenty-five

2. If Fran’s fudge recipe calls for two and one-half cups of sugar and she increases it by two-fifths of a cup, how much sugar does she use? (1 point)

two and two-tenths

2two and three-sevenths

2two and four-ninths

2two and nine-tenths

3. Which of the following makes the statement true? one over five to the zero power = ? (1 point)

1

–1

–5

0

4. The area of a certain state is 840,000 square miles. What is this area in scientific notation? (1 point)

8.4 x 10-4

84 x 10-3

84 x 103

8.4 x 105

5. Which is irrational? (1 point)

0.117117117 . . .

0.8596873205 . . .

0.812812812812 . . .

0.605605605 . . .

6. If there is one-half of a pizza and Jonas wants only one-third of it, how much of the pizza will he eat? (1 point)

one-fifth

two-fifths

one-sixth

two-sixths

7. Harold brought two loaves of raisin bread to share with his friends. If there are 12 people total, including Harold, how much of the bread does each person receive? (1 point)

0.06

0.16 repeating

0.25

point three repeating

8. One nanometer is about 0.00000003937 of an inch. What is this number in scientific notation? (1 point)

3.937 x 10-8

3.937 x 108

39.37 x 10–7

39.37 x 107

9. What is three-eighths written as a decimal? (1 point)

two point three repeating

0.375

point three repeating

2.667

10. According to the 2010 census data, the population of Texas was about 2.5 x 107 people. The land area of Texas is about 2.6 x 105 m2. What was the average number of people per square mile in 2010? (1 point)

0.96 x 102

9.6 x 101

0.96 x 1035

9.6 x 1012

11. Based on the 2010 census, the population of Georgia was 9.6 x 106 people. Which state had a larger population? (1 point)

Alaska: 7.1 x 105

New York: 1.9 x 107

Wyoming: 5.6 x 105

Idaho: 1.5 x 106

12. Which of the following numbers is an example of an integer? (1 point)

square root of five

square root of nine

one-third

0.8

13. Which number is equivalent to four-fifths? (1 point)

twenty-five over one hundred

0.2

sixteen over one hundred

0.8

14. Riding the bus, Jasmine uses two-thirds of her money for bus fare. What is this number as a decimal? (1 point)

point three repeating

point six repeating

point eight repeating

one point five repeating

15. What is the solution to 2six-sevenths ÷ two-fourteenths? (1 point)

7

14

20

40

- math help plzzzz!!!! -
**Bosnian**, Wednesday, October 30, 2013 at 8:55am1.

0.32 = 32 / 100 = 4 * 8 / ( 4 * 25 ) = 8 / 25

2.

2 + 1 / 2 + 2 / 5 = 2 + 5 * 1 / ( 5 * 2 ) + 2 * 2 / ( 5 * 2 ) = 2 + 5 / 10 + 4 / 10 = 2 + 9 / 10

3.

The number raised to the zero power is equal to one.

( 1 / 5 ) ^ 0 = 1

4.

840,000 = 8.4 * 100 * 1,000 = 8.4 * 10 ^ 2 * 10 ^ 3 = 8.4 * 10 ^ 5

5.

An Irrational Number is a real number that can't be written as a simple fraction.

0.117117117... = 117 / 999

0.8596873205... can't be written as the fraction

0.812812812812... = 812 / 999

0.605605605... = 605 / 999

So 0.8596873205... is irrational.

6.

( 1 / 2 ) * ( 1 / 3 ) = 1 / 6

7.

2 / 12 = 2 / ( 2 * 6 ) = 1 / 6 = 0.16666666

8.

0.00000003937 = 3.937 / 100,000,000 = 3.937 / 10 ^ 8 = 3.937 * 10 ^ - 8

9.

3 / 8 = 0.375

10.

2.5 * 10 ^ 7 / ( 2.6 * 10 ^ 5 ) =

( 2. 5 / 2.6 ) * 10 ^ 7 / 10 ^ 5 =

0.96 * 10 ^ 2

11.

New York: 1.9 * 10 ^ 7

12.

sqrt ( 9 ) = 3

13.

4 / 5 = 2 * 4 / ( 2 * 5 = 8 / 10 = 0.8

14.

2 / 3 = 0.66666

15.

( 2 + 6 / 7 ) / ( 2 / 14 ) = ( 2 * 7 / 7 + 6 / 7 ) / [ ( 2 * 1 ) / ( 2 * 7 ) ] =

( 14 / 7 + 6 / 7 ) / ( 2 * 1 ) / ( 1 / 7 ) =

( 20 / 7 ) / ( 1 / 7 ) = 7 * 20 / 7 = 20

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