Find the area of a circle in terms of pi with a radius of 7.4 cm.

Mathematics

2 answers:

vfiekz [6]3 years ago

6 0

Answer: I think the answer is 13.69

Anit [1.1K]3 years ago

4 0

$A= \pi r^{2} =\\A=\pi (7.4)^{2}=\\A=\pi (54.76)=\\A=54.76\pi$

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An airplane is flying at 35,000 feet above sea level airplane started to send a rate of 2500 ft./min. after five minutes how man

vitfil [10]

Answer:

22,500 feet

Step-by-step explanation:

Initial Height of the airplane = 35000 feet

Rate of descend = 2500 ft/min

This means for every minute the height of the plane is decreasing by 2500 feet.

We have to find how high above the sea level is the airplane after 5 minutes.

Since, in one minute the distance of plane is decreasing by 2500 feet, in 5 minutes the decrease in its distance would be = 2500 x 5 = 12,500 feet

Thus, after 5 minutes the height of airplane would have decreased by 12,500 feet. Since, the initial height of airplane was 35,000 feet, the new height after 5 minutes would be:

Height after 5 minutes = 35000 - 125000 = 22,500 feet

After 5 minutes, airplane is 22,500 feet above the sea level

6 0

3 years ago

The cost in dollars of producing x vehicles for a company is given by C(x)=1200x+5500

GarryVolchara [31]

The rate of change represents the variable production cost rate. The production cost is increased in 1200 units per each additional manufactured car.

<h3>Interpretation of a linear function</h3>

Let be $C$ and $x$ the production cost and the number of vehicles produced, it there is a linear relationship between the two variables, then we have the following formula:

$C(x) = \dot r \cdot x + C_{o}$ (1)

Where:

$C_{o}$ - Fixed production costs.
$\dot r$ - Variable production cost rate.

In a nutshell, the rate of change represents the variable production cost rate. The production cost is increased in 1200 units per each additional manufactured car. $\blacksquare$