Answer:
11 3/7 hours
Step-by-step explanation:
The shorter candle burns faster, so the candles will not be the same height (0) until the taller candle burns completely. At 0.7 in/h, that will take ...
(8 in)/(0.7 in/h) = 80/7 h = 11 3/7 h
For this case we have the following expression:

When making multiplication, the first thing you should keep in mind is the following property:
Same basis, the exponents are added.
We have then:

Rewriting we have:
Answer:
The simplified expression is given by:
Answer:
169 meters
Step-by-step explanation:
52/4=13 (since it's a square you divide it by 4 because the sides are equal, so each side is 13 meters)
13^2=169 (to find the area you square the length of each side)
Answer:
B
Step-by-step explanation:
The trick you need to employ is that when the rock hits the ground, the timer stops. So h must be taken as 0.
0 = - 16t^2 + 255 Set up the equation
- 255 = - 16t^2 Divide by -16
15.9375 = t^2 Switch
t^2 = 15.9375 Take the square root of both sides.
sqrt(t^2) = sqrt(15.9375)
t = 3.992 seconds
The closest answer is B
Answer:
Three hundred forty million two hundred fifty-three thousand five hundred thirty-five