An equation is formed of two equal expressions. The equation 7*e^0.1t=47 can be expressed as t=[ln (47/7)]/0.1.
<h3>What is an equation?</h3>
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The equation 7*e^0.1t=47 in terms of logarithm in terms of base-e can be solved as,

Hence, the equation 7*e^0.1t=47 can be expressed as t=[ln (47/7)]/0.1.
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D=rt
distance = rate*time
rate=15mph
time=3.5hours
distance = 15*3.5 = 52.5
He will travel 52.5 miles in 3.5 hours assuming his rate does not change.
Answer:


The measure of the reference angle is 
Step-by-step explanation:
The reference angle of an angle is the magnitude of the smallest angle it makes with the x-axis. In this case, we have
(*Note:
, use
to convert to degrees)