5. A total of 65.0 kilojoules of heat are absorbed as 58,3 g of lead is heated from 12.0°C to
1 answer:
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Answer:
Step-by-step explanation:
The circumference of a circle can be found using the following formula:
where d is the diameter. We are given the radius, so let's find the diameter.
The diameter is twice the radius.
The radius is 15 feet.
Multiply.
Now we know the diameter. Substitute 30 feet in for d.
We are using 3.14 for pi, so substitute it in.
Multiply.
The circumference of the circle is 94.2 feet.
Answer:
D) y = 10 - 0.05x
Step-by-step explanation:
The number of gallons of gas left in the tank of Anna's car can be represented using a linear function in the form
where
x is the number of miles driven
q is the amount of gallons initially in the tank, when x = 0
m is the number of gallons consumed per mile driven
First of all, we observe that:
- The sign of m must be negative, because as the car drives, the number of gallons left in the tank (y) must decrease. Therefore, we can immediately exclude option C)
- The problem says that the car has a small tank. Therefore, the number of gallons in the tank at the beginning must be the minimum possible, so in this case, q = 10
Therefore, the correct function is:
y = 10 - 0.05x
which means that: at the beginning, the tank contains 10 gallons, and 0.05 gallons per mile are consumed as the car moves.