The answer is 376.8 m.

It is given:
radius: r = 60 m
<span>π = 3.14
c = </span><span>π * d
d - diameter.

It is known that diameter is twice of radius:
d = 2r

So, implement it in the formula:
c = </span>π * d = π * 2r = 3.14 * 2 * 60 = 376.8 m

6 0

4 years ago

Two horses ran from the same place at the same time. One horse ran at a speed of 16 m/sec and the other ran at a speed of 18 m/s

faltersainse [42]

Answer:

1 minute = 1080 - 960 = 120 m

5 minutes = 5400 - 4800 = 600 m

8 minutes = 8640 - 7680 = 960 mStep-by-step explanation:

5 0

3 years ago

There are 5 green, 1 red, and 1 blue book on the shelf. How many ways can they be arranged if the red and blue book are separate

zloy xaker [14]

Answer:

3,600

Step-by-step explanation:

There are 5 green, 1 red, and 1 blue book on the shelf, 7 books in total.

First, count the number of ways when the red and the blue books are not separated. If these books are not separated, you can count them as one book, so there are 6 books in total which can be arranged in

$6!=1\cdot 2\cdot 3\cdot 4\cdot 5\cdot 6=720$

different ways.

But red and blue books can be rearranged in two ways: blue, red or red, blue, so the number of ways books can be arranged if the red and blue book are not separated is

$2\cdot 720=1,440.$

Hence, the number of ways books can be arranged if the red and blue book are separated is

$7!-1,440=720\cdot 7-1,440=720(7-2)=720\cdot 5=3,600$

3 0

3 years ago

Plutonium -25 has a half live of 6 hours . George has 5000 grams of plutonium -25 . How much plutonium-25 will hearse have after

mart [117]

The amount (a) after d days will be
.. a(d) = 5000*(1/2)^(4d)

.. a(4) = 5000*(1/2)^(4*4) = 5000/2^16 ≈ 0.076 . . . grams

George will have about 0.076 grams after 4 days.

8 0

3 years ago