Answer:
b. 4:35 p.m
Step-by-step explanation:
Her speed in t minutes after 4:30 p.m. is modeled by the following equation:
In which v(0) is her speed at 4:30 pm and a is the acceleration.
At 4:30 p.m. she looks down at her speedometer and notices that she is going 45 mph.
This means that
Ten minutes later she looks down at the speedometer again and notices that she is going 55 mph.
This means that
So
So
When was she moving exactly 50 mph?
This is t minutes after 4:30 p.m.
t is found when v(t) = 50. So
5 minutes after 4:30 p.m. is 4:35 p.m.
So the correct answer is:
b. 4:35 p.m
Answer: The radius of the circle is 162 units.
Step-by-step explanation:
The circumference of the circle is given by :-
, where r = radius of the circle.
As per given , we have ,
A circle has a circumference of 1,017.36 units .
From the above formula , we have
Hence, the radius of the circle is 162 units.
Let's look at the decimal number. We want to know where root 91 is in relation to the decimal number. The decimal number is between 12 and 13, or in other words, between
and
. Both of these numbers are larger than
meaning that the answer has to be
A