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3 years ago

What is the area of a circle with a radius of 40 cm? cm2 (Use 3.14 for Pi.)

Mathematics

1 answer:

ira [324]3 years ago

5 0

A= pi x radius squared

A= 3.14 x 40squared

A= 5024 cm2

Hope this helps ya.

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A car was originally purchased in January 2010 for 27000 dollars. The car depreciates at a rate of 18% every year.

Maksim231197 [3]

Answer:

Number of year(n) = 3.4 year (Approx)

Step-by-step explanation:

Given:

Purchase value of car = $27,000

Depreciation rate per year (d) = 18% = 0.18

Future price = half of its original value = $27,000 / 2 = $13,500

Find:

Number of year(n) = ?

Computation:

$Future price =Purchase value(1-d)^n\\\\13,500=27,000(1-0.18)^n\\\\0.5=(0.82)^n\\\\n=3.444(Approx)$

Number of year(n) = 3.4 year (Approx)

5 0

3 years ago

All of the following are equal except___. 1/4^3 4^5/4^ 4^-3 4^2/4^5

Mariulka [41]

Answer:

$\frac{4^{5}}{4^{2}}\\$

Step-by-step explanation:

$\frac{1}{4^{3}} =4^{-3}\\\\4^{-3}\\\\\frac{4^{2}}{4^{5}}=4^{2-5}=4^{-3}$

But 4^5/4^{2} = 4^3

5 0

3 years ago

Jake needs to put gas in the delivery van regular gasoline is 3.20 per gallon he only had a $20 bill on him how many gallons can

Fed [463]

Your max amount for this is $20. Let's say x represents the number of gallons.

20 ≥ 3.2x
x = 6.25 gallons
If they're asking for integers or whole numbers, you'd round down to 6 because you only have enough money for 6 full gallons. If you rounded up to 7, you wouldn't be able to fill it up completely because then you'd be over your $20.00 budget for gas.

4 0

3 years ago

Read 2 more answers

Problem Page

MrMuchimi

Answer:

1 machine must be made to minimise the unit cost.

Step-by-step explanation:

Step 1: Identify the function

x is the number of machines

C(x) is the function for unit cost

C (x) = 0.5x^2-150 + 21,035

Step 2: Substitute values in x to find the unit cost

C (x) = 0.5x^2-150 + 21,035

The lowest value of x could be 1

To check the lowest cost, substitute x=1 and x=2 in the equation.

When x=1

C (x) = 0.5x^2-150 + 21,035

C (x) = 0.5(1)^2-150 + 21,035

C (x) = 20885.5

When x=2

C (x) = 0.5x^2-150 + 21,035

C (x) = 0.5(2)^2-150 + 21,035

C (x) = 20887

We can see that when the value of x i.e. the number of machines increases, per unit cost increases.

Therefore, 1 machine must be made to minimise the unit cost.

3 0

3 years ago

!!!*BRAINLIEST*!!!

QveST [7]

Answer:

Step-by-step explanation:

Area = length times height times width

Area = 164 x 82 x 9.8

= 131790.4

Multiply by 7.48 since it takes 7.48 gallons to fill a cubic foot then you find the answer of A.

8 0

3 years ago

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