Answer:
80 miles per hour
Step-by-step explanation:
The answer is 75. You can find this using the equation 9 = 0.12x and then dividing 9 by 0.12 or 12%.
The partial products are: 42 x 28 = (40 + 2) x (20 + 8) = 40 x 20 + 40 x 8 + 2 x 20 + 2 x 8
= 800 + 320 + 40 + 16 Hope this helped.
I mean it depends what lake and where and the temperature, all variables you have to consider.