Answer:
810
Step-by-step explanation:
3 x 3 x 9 x 10 = 810 [times means multiply]
Answer: ↓↓
Step-by-step explanation:
The original value of the cellphone is $650. The function represents an exponential decay because if it was exponential growth, the function would look like this:

Answer: y = -8.5
<u>Explanation:</u>
5.1y + 21.3 = -0.3y - 24.6
<u>+0.3y </u> <u>+0.3y </u>
5.4y + 21.3 = -24.6
<u> -21.3 </u> <u> -21.3 </u>
5.4y = -45.9
<u>÷5.4 </u> <u> ÷5.4 </u>
y = -8.5