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3 years ago

The radius of a circle is 3 cm what is the circumference

Mathematics

1 answer:

malfutka [58]3 years ago

6 0

the circumference is about 18.85

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If the circumference of a circle is 84.5 ft, find the radius.

Elina [12.6K]

Answer:

13.448, rounded off: 13.5 ft

Step-by-step explanation:

$r=\frac{C}{2\pi }$

Where r = radius, C = circumference.

$r=\frac{84.5}{2\pi } =13.448$ = 13.5 ft

6 0

2 years ago

Read 2 more answers

If r=10 and s=31, find R. Round to the nearest tenth.

mars1129 [50]

Answer:

C. R = 17.9 degrees

Step-by-step explanation:

We have a rectangle triangle with the adjacent side and the opposite side (neither of which are the hypotenuse).

The relation between those elements is the tangent:

$tan(angle) = \frac{Opposite side}{Adjacent side}$

So, to isolate the angle, we modify the formula as such:

$angle = arctan(\frac{Opposite side}{Adjacent side}) = arctan(\frac{10}{31}) = arctan(0.3225) = 17.87$

If we round 17.87 degrees to the tenth... we get 17.9 degrees.

5 0

2 years ago

Read 2 more answers

A skate ramp is 4.2 meters long. It rises up 1.7 meters. What’s is the angle of elevation to the nearest tenth of a degree?

Kipish [7]

Θ
=
arcsin
(
.7
4.2
)
≈
10
∘
Explanation:
We view the ramp as a right triangle. The hypotenuse is 4.2 and the vertical side .7, which is opposite the angle
θ
we seek.
sin
θ
=
.7
4.2
=
1
6
I'm going to finish the problem but I'll note if we were actually building the ramp we don't need to know the angle; this sine is sufficient.
θ
=
arcsin
(
1
6
)
θ
≈
10
∘
which I think is a pretty steep ramp for a wheelchair.
There will be another inverse sine that is the supplementary angle, around
170
∘
, but we can rule that out as a value for a ramp wedge angle.

4 0

2 years ago

(3.45 x 103) + (1.23 x 103)

mr Goodwill [35]

Answer:

482

Step-by-step explanation:

!!!!!!!!!!!!!!!!!

6 0

3 years ago

Estimate the value of 52/ to the nearest whole number

REY [17]

It is 52 because when roundest to the whole number 52 is closest

6 0

3 years ago