Answer:
=39.42857143 miles per hour
Step-by-step explanation:
To find the average speed, we need to the total distance and the total time
Distance 1
45 miles for 2 hours
45*2 = 90 miles
Distance 2
90 minutes * 1 hour/60 minutes = 1.5 hours
32 miles * 1.5 hours =48 miles
The total distance = 90+48 = 138 miles
The total time = 2 +1.5 = 3.5 hour
The average speed = total distance/ total time
= 138/3.5
=39.42857143 miles per hour
Answer:
Step-by-step explanation:

Answer:
10% or 1%
Step-by-step explanation:
i swear u better not remove this
Answer:
a)
: at time t = 2 minutes the temperature will be 8.265 degress
b)
: the temperature will be 6 degrees at time t = 3.55 minutes.
Step-by-step explanation:
When dealing with temperature changes, it's best to work with Newton's Law of Cooling.

here:
: the temperature in the room.
: ambient (or outdoor) temperature (that always remains constant, in our case:
)
: are constants
Our conditions are provided:
1) 
2) 
using the first condition

using the second condition:

we can use our calculated value of C to find k

Finally we can put these constants back in the main equation:

or 
a) Reading after one more minute?
so it's asking:
T(2) = ?

Hence, after one more minute the temperature of the room will be 8.267 degrees
b) When will it be 6 degrees?
T(t) = 6?

Hence at t = 3.55 minutes the temperature of the room will be 6 degrees.
Answer:
9 is correct
Step-by-step explanation: