Question

Найдите 20% от 30% числа n, если n=3a^2-2a при a=20 ​

Answer 1

Ответ:

Пошаговое объяснение:

n=3*(20)²-2*20=3*400-40=1200-40=1160.

0,3*1160=348.

0,2*348=69,6.

Answer 2

To find 20% of 30% of a number n, we first need to calculate the value of n using the given equation with a = 20.

Given: n = 3a^2 - 2a a = 20

Substituting the value of a into the equation: n = 3(20)^2 - 2(20) n = 3(400) - 2(20) n = 1200 - 40 n = 1160

Now, we can find 20% of 30% of n by multiplying n by 0.2 and then by 0.3:

20% of 30% of n = 0.2 * 0.3 * n

Substituting the value of n: 20% of 30% of n = 0.2 * 0.3 * 1160 20% of 30% of n = 0.06 * 1160 20% of 30% of n = 69.6

Therefore, 20% of 30% of the number n, where n = 3a^2 - 2a and a = 20, is 69.6.