Answer:
go by basics u will get it easier
Step-by-step explanation:
assume X2 + e3x as some function t
now find derivative you get (1/t )dt/dx
now find dt /dx. simply derivative with respect to x
for second question use formula
dy/dx = - partial derivative of function with x / partial derivative of function with respect to y
Answer: 
Step-by-step explanation:
Simply divide by c to isolate x.
104 is the answer, How did I get it? First, I put 65% into a decimal by moving two places to the left which then became .65 and multiplied it to 160 and got 104.
for every 1/10 second it travels 21.98 inches
for a full second it travels 21.98 x 10 = 219.8 inches
for 1 minute it travels 219.8 x 60 = 13188 inches / 12 = 1099 feet per minute
1099*60 = 65940 feet per hour
5280 feet per mile
65940/5280 = 12.488= 12.5 miles per hour
