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Eduardwww [97]
3 years ago
11

A two way table shows information about pupils in a primary school

Mathematics
1 answer:
arlik [135]3 years ago
7 0

Answer:

42 boys can count (given)

P(boy & can count) = 0.35

Step-by-step explanation:

P(boy who can count) = 42/120

7/20 = 0.35

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Correct question :

The average speed that a tsunami (a large tidal wave) travels is represented

by the functions = (200d)^1^/^2 where s is the speed (in miles per hour) that the tsunami is traveling and d is the average depth (in feet) of the wave.

a. Find the inverse of the function.

b. Find the average depth of the tsunami when the recorded speed of the wave is 250 miles per hour.

Answer:

a) d = \frac{s^2}{200}

b) 312.5 ft

Step-by-step explanation:

Given:

Average speeds, s = (200d)^1^/^2

a) To find the inverse of the function.

s = (200d)^1^/^2

s² = 200d

200d = s²

d = \frac{s^2}{200}

Therefore, inverse of the function =

d = \frac{s^2}{200}

b) average depth when speed is 250 miles per hour.

Average depth = d

Therefore, let's use the formula :

d = \frac{s^2}{200}

= \frac{250^2}{200}

= \frac{62500}{200}

d = 312.5 feet

The average depth when speed is 250 miles per hour is 312.5 ft

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Last one

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