Hi!
Use the percentage formula to solve:
90 * 50 / 100 = 45
Tiffany answered 45 questions correctly.
Hey there,
Your questions states: <span>What is the value of the expression
3.6 x 10^8 over 1.2 x 10 ^3?
3.6 x 10^8 = 360,000,000
1.2 x 10^3 = 1,200
Your correct answer would be
. . .
</span>

<span>
Hope this helps.
~Jurgen</span>
<span>The answer to this question is 4<span>x2</span></span><span><span>−9</span><span>y<span>2</span></span></span>
Answer: a = 6.53
Step-by-step explanation: