Please help! Will give brainliest!
Which set of side lengths form a right triangle?

3 ft, 6 ft, 5 ft

10 in., 41 in., 40 in.

15 m, 20 m, 25 m

7 cm, 8 cm, 10 cm

The third option.

Step-by-step explanation:

For a right triangle the square on longest side = sum of the squares on the other 2 sides (Pythagoras's Theorem).

25^2 = 625

15^2 + 20^2 = 625

So its the third set.

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: