The following masses are given in kilograms. use metric prefixes on the gram to rewrite them so the numerical value is bigger than one but less than 1000. for example, 7×10^−4kg could be written as 70 cg or 700 mg.
(a) 3.8×10^−5kg
(b) 2.3×10^17kg
(c) 2.4×10^−11kg
(d) 8×10^15kg
(e) 4.2×10^−3kg.

a) 38 mg

b) 230 Exa-g

c) 24 ng

d) 8 Eg

e)  4.2 g

Step-by-step explanation:

Given:

a) 3.8×10⁻⁵ kg

1 kg = 10⁶ mg

Multiply the above value by 10⁶

we get

3.8×10⁻⁵ × 10⁶ = 38 mg

b) 2.3 × 10¹⁷ kg

or

2.3 × 10²⁰ g

1 exa = 10¹⁸

multiply by 10⁻¹⁸

we get

230 Exa-g

c) 2.4 × 10⁻¹¹ kg

or

24 × 10⁻⁹ g

1 g = 10⁹ ng

thus,

24 × 10⁻⁹ g × 10⁹ = 24 ng

d)  8×10¹⁵ kg

or

8 × 10¹⁸ g

1 exa gram = 10¹⁸ g

( 8 × 10¹⁸ ) × 10⁻¹⁸ = 8 Eg

e) 4.2 × 10⁻³ kg

or

4.2 × 10⁻³ × 10³ = 4.2 g

the reporter's right

step-by-step explanation:

1/4 = .25 / 25%

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!