Answer:
90 mph
Step-by-step explanation:
if it can go 45 mph, in 2 hrs, it should go 90
45*2=90
Answer:
2
Step-by-step explanation:
We have the equation

The exponent rules to be used are



Comparing the exponents we get

So, the value of
makes the equation true.
Using exponential function concepts, it is found that the daily rate of change in the mass of the sample is of -4%, that is, the amount decays by 4%.
<h3>What is an exponential function?</h3>
A decaying exponential function is modeled by:

In which:
- A(0) is the initial value.
- r is the decay rate, as a decimal.
In this problem, the function is:

Hence:


1 - r < 1, hence the rate is negative, and the daily rate of change in the mass of the sample is of -4%.
You can learn more about exponential function concepts at brainly.com/question/25537936