Answer:
5.43×10^14 or

Step-by-step explanation:
Scientific notation, the number must always be less than 10, in this case 5.43. The exponent represents how much times I moved the decimal point to the left.
<span>If three sides are proportional their angles must be identical therefore they are always similar.</span>
Area is supposed to be multiplied by 2.
1.70 - 0.45 = 1.25
1500 ÷ 1.25 = 1200
Gina must sell 1200 cards before she can make a profit
First is pears ,next is apple, and the last is oranges. 3,900, 3800, 3500. I hope that this helps.