Question

PLEASE HELP!!!!!!!







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 is an example of an irrational number?
(1 point)square root of twenty five
–31
1.414213562..
1 over 15







15.

Which number is equivalent to 0.3?
(1 point)one-third
thirty-three over one hundred
five-sixths
two-thirds







16.

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







17.

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







18.

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







19.

8 over 9 + (negative three fourths) =
(1 point)eleven over thirteen
five over thirty-six
negative twenty-four over thirty-six
1







20.

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







21.

one over four × negative one half
(1 point)–one-eighth
one-eighth
–one-fourth
negative one-half







22.

five-eighths ÷ fifteen over sixteen =
(1 point)five over twelve
three-fourths
three-halves
two-thirds







23.

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







24.

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

Answer 1

13. 0.0000000228
14. 1 over 15
15. one-third
16. point three repeating
17. 2two and five eighths
18. -0.59
19. 2.25
20.
21. -0.25
22. 0.6
23. 3
24. 4 and 4 over 9

Answer 2

Answer:

13. 0.0000000228

14. 1 over 15

15. one third

16. point three repeating

17. 2two and five-eighths

18. negative twenty-five over forty-two

19. negative five over thirty-six

20. negative one and sixteen over twenty-one

21. –one-eighth

22. two-thirds

23. 3

24. 4 and 4 over 9

Step-by-step explanation:

13. We count the number of digits after the comma. In this case, the number of digits after the comma is 8. Therefore, the number will be 0.0000000228

14. An irrational number occurs when there is a recurrence of a number. For , example 1/15 gives 0.0666666 or simply 0.066...

15 - 24 The other numbers are simply mathematical operators expressed in words. Rules of addition, multiplication and division are applicable.

For example, for number 18, the operator will be:

$-\frac{1}{6} + (-\frac{3}{7} )\\= -\frac{7}{42}-\frac{18}{42} \\= -\frac{24}{42}$

This gives the first option.