3 and 4 need answer big points

Step-by-step explanation:

3.  You would use the formula distance= rate x time

3^13 mph= rate    3^12 hours= time

When multiplying exponents with the same base you add the exponents.

3^13 * 3^12 = 3^(13+12) = 3^25

4. The easiest way to solve this problem is to divide using scientific notation.

First,  convert 10 x 10^9 into scientific notation.= 1 x 10^10

Then, write the ratio of 1 x 10^10 to 5 x 10 ^3.

Divide the coefficients and subtract the exponents.

1 x 10^10

5 x 10 ^3

1/5= 0.2

10-3= 7

0.2 x 10^7

Convert to scientific notation.

2 x 10^6

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: