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Fudgin [204]
3 years ago
8

What is the radius of a circle whose area is 36 cm2

Mathematics
1 answer:
blsea [12.9K]3 years ago
7 0

Answer:

your answer should be 6! :)

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A car travels at an average speed of 52 miles per hour. How long does it take to travel 299 miles
drek231 [11]
The answer should be 299/52=almost 6 hours.
6 0
3 years ago
the minute hand of a clock is 5 inches long. what is the area of the circle, in square inches, created in a hand sweep in an hou
ira [324]
Solve the area of the whole circle since in an hour, the minute hand covers the whole clock
assuming that the minute hand reaches all the way out to the edge of the clock


the minute hand is the radius
area=pi times r^2
r=5
5^2=25
area=pi times 25
area=25pi

aprox pi=3.14
25 times 2.14=78.5

area=78.5 in^2
6 0
3 years ago
FIND THE SUM OF 20 TERMS OF THE ARITHMETIC SERIES IN WHICH 3rd TERM IS 7 AND 7th TERM IS 2 MORE THAN THREE TIMES ITS 3rd TERM
algol13

Answer:

740

Step-by-step explanation:

The n th term of an arithmetic series is

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Given a₃ = 7 and a₇ = (3 × 7) + 2 = 21 + 2 = 23 , then

a₁ + 2d = 7 → (1)

a₁ + 6d = 23 → (2)

Subtract (1) from (2) term by term

4d = 16 ( divide both sides by 4 )

d = 4

Substitute d = 4 into (1)

a₁ + 2(4) = 7

a₁ + 8 = 7 ( subtract 8 from both sides )

a₁ = - 1

The sum to n terms of an arithmetic series is

S_{n} = \frac{n}{2} [ 2a₁ + (n - 1)d ] , thus

S_{20} = \frac{20}{2} [ (2 × - 1) + (19 × 4) ]

     = 10(- 2 + 76) = 10 × 74 = 740

8 0
3 years ago
the set points (-4,1),(-4,-4),(2,-4),(2,1) identifies the vertices of a quadrilateral which is the most specific description of
raketka [301]

Answer:

The answer is a trapezoid.

Hope this helped!


6 0
3 years ago
Read 2 more answers
Solve the proportion: 11/12.1= x/66 x = <br> A. 64.9 <br> B. 60<br> C. 72.6 <br> D. 55
solmaris [256]

\dfrac{11}{12.1}=\dfrac{x}{66}\qquad\text{cross multiply}\\\\12.1x=(11)(66)\\\\12.1x=726\qquad\text{divide both sides by 12.1}\\\\x=60\\\\Answer:\ B.\ 60

8 0
3 years ago
Read 2 more answers
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