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2 years ago

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

Mathematics

1 answer:

Paraphin [41]2 years ago

4 0

Answer:

Step-by-step explanation:

radius, r = 7 cm

$Area = \pi r^2 = \pi \times 7^2 = 49 \pi = 153.94 \ cm^2\\\\Perimeter = 2 \pi r = 2 \pi \times 7 = 43.98 \ cm$

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The diagram shows a 5 cm x 5 cm x 5 cm cube,

slava [35]

For this you need the pythagorean theorem.
5 squared is: 25
25+25= 50
then u need the square root of 50 which is approximately= 7.07107 cm

The length of the diagonal AB is 7.07107 cm

5 0

3 years ago

Help on this please

eimsori [14]

Answer:

Opening: Opens upwards

Axis of Symmetry: -7/2

Vertex: (-7/2, -81/4)

X - intercepts: (1, 0) and (-8, 0)

Y - intercept: (0, -8)

Step-by-step explanation:

Opening: 'a' is greater than zero

Axis of Symmetry:

$\frac{-7}{2(1)} =\frac{-7}{2}$

Vertex:

$y= (\frac{-7}{2})^{2} +7(\frac{-7}{2}) -8\\y= (\frac{49}{4}) +(\frac{-49}{2}) -8\\y= \frac{49}{4} +\frac{-98}{4} -8\\y=\frac{-49}{4}-8\\y = \frac{-81}{4}$

X - intercepts:

(x-1)(x+8)

x = 1 and x = -8

Y - intercept: (0, -8)

$y= 0^{2} +7(0) -8\\\\y= -8\\$

5 0

3 years ago

The Hughes purchased a new condo for $ 1,000,000. at 8 % for 30 years. What is the monthly payment?

viktelen [127]

We know that

P = A/D
Where,
P = monthly payments,
A = Total amount =$1,000,000
$D=[(1+r/12) ^{12*t}-1]/[(r/12)*(1+r/12)^{12*t}]$

in this problem

t=30 years
r=8%----> 0.08

$D=[(1+0.08/12) ^{12*30}-1]/[(0.08/12)*(1+0.08/12)^{12*30}] =136.2835$

$P=1000000/136.2835-----\ \textgreater \ P=$7337.65$

the answer is
$7337.65

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3 years ago

How do you find the midpoint M?

posledela

Answer:

Step-by-step explanation

By using midpoint formula :

(X,Y) = (X1+X2/2) ,(Y1+Y2/2)

3 0

3 years ago

Read 2 more answers

Find x. Round the nearest tenth

Evgesh-ka [11]

Answer:

15.9

Step-by-step explanation:

x = 10/ cos 51° = 10/0.629 = 15.9

3 0

2 years ago