PLEASE HELP!!!!!!!

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What is 2.28 × 10–8 in standard form?

(1 point)228,000,000

22,800,000

0.0000000228

0.000000228

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Which of the following is an example of an irrational number?

(1 point)square root of twenty five

–31

1.414213562..

1 over 15

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Which number is equivalent to 0.3?

(1 point)one-third

thirty-three over one hundred

five-sixths

two-thirds

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Riding the bus, Roger uses one-third of his money for bus fare. What is the fraction of his money expressed as a decimal?

(1 point)point three repeating

point six repeating

point eight repeating

one point five repeating

1. 
   
   

Serena has seven-eighths yd of fabric. To complete her craft project, she needs 3 times that amount. How many yards of fabric does Serena need?

(1 point)2two and five-eighths

two and seven-eighths

3three and three-sevenths

three and seven-eighths

1. 
   
   

negative one over six + (–three over seven) =

(1 point)negative twenty-five over forty-two

negative four over thirteen

eleven over forty-two

two over thirteen

1. 
   
   

8 over 9 + (negative three fourths) =

(1 point)eleven over thirteen

five over thirty-six

negative twenty-four over thirty-six

1

1. 
   
   

5one-third – three and four-sevenths=

(1 point)two and three fourths

–two and three fourths

one and sixteen over twenty-one

negative one and sixteen over twenty-one

1. 
   
   

one over four × negative one half

(1 point)–one-eighth

one-eighth

–one-fourth

negative one-half

1. 
   
   

five-eighths ÷ fifteen over sixteen =

(1 point)five over twelve

three-fourths

three-halves

two-thirds

1. 
   
   

A piece of string is 3 yards long. How many 1one-fourth–yard-long pieces can Julie cut from the string?

(1 point)1

2

3

4

1. 
   
   

5 and 1 over 3 ÷ one and one fifth =

(1 point)4 and 4 over 9

–4 and 4 over 9

51 over 15

41 over 15