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2 years ago

Find out the area and perimeter of circle of radius 7cm

Mathematics

2 answers:

Mice21 [21]2 years ago

8 0

Answer:

Step-by-step explanation:

area of circle=πr^2

=3.14*(7)^2

=3.14*49

=153.86 cm^2

perimeter of a circle(circumference)=2πr

=2*3.14*7

=14*3.14

=43.96 cm

lutik1710 [3]2 years ago

4 0

Answer:

$area = \frac{\pi}{4} \times {r}^{2} \\ = \frac{\pi}{4} \times {7}^{2} \\ = \frac{\pi}{4} \times 49 \\ = 38.48451000647 \: cm \: ans......$

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Use properties of addition to find 37 + 58 mentally.

Ira Lisetskai [31]

37+58 = 95

To explain my thought process:
37+58 = 30+50+7+8
30+50=80
7+8=15
80+15=95

4 0

3 years ago

Read 2 more answers

which term can be added to the list so that the greatest common factor of the three terms is 12h3? 36h3, 12h6,

Svetradugi [14.3K]

Any multiple of 12h^3.

Remember that the greatest common factor is the common terms raised to the lowest power. Then you can include any terms that includes 12h^3

<span>For example, 12h^3, or 24h^12, 60h^9, etc.

Hope This Helps!</span>

8 0

3 years ago

hunter has a jar of 368 nickels and dimes. the total value of coins is $28.40. which system of equations below would be the best

gavmur [86]

Answer:

We can't see your answer choices, but it would be n + d = 368 and .05n + .10d = 28.40

Step-by-step explanation:

4 0

2 years ago

g The altitude of a triangle is increasing at a rate 2 inch/hour while the area of the triangle is decreasing at a rate of 0.5 s

zubka84 [21]

Answer:

The base of the triangle is decreasing at a rate of 1.4167 inch/hour.

Step-by-step explanation:

Area of a triangle:

The area of a triangle of base b and height h is given by:

$A = bh$

In this question:

We have to derivate the equation of the area implicitly in function of time. So

$\frac{dA}{dt} = b\frac{dh}{dt} + h\frac{db}{dt}$

The altitude of a triangle is increasing at a rate 2 inch/hour while the area of the triangle is decreasing at a rate of 0.5 square inch per hour.

This means that:

$\frac{dh}{dt} = 2, \frac{dA}{dt} = -0.5$