Question

1) 7.2 * 10 ^ 3 + 8, 3 * 10 ^ 3 2)(4*10^5):(9*10^8)

Answer 1

А) 7.2 * 10 ^ 3 + 8, 3 * 10 ^ 3=15,5•10^3=15,5•1000=15500

Б)(4*10^5):(9*10^8)=4•10^5/9•10^8=4/9•10^3=4/9•1000=1/9•250=1/2250

Альтернативный вид:2250^-1

Answer 2

1. To perform the addition, we need to make sure the exponents are the same. In this case, both numbers have an exponent of 3, so we can directly add the coefficients:

7.2 * 10^3 + 8.3 * 10^3 = (7.2 + 8.3) * 10^3 = 15.5 * 10^3

The result is 15.5 times 10 raised to the power of 3, or 15,500.

2. To perform the division, we need to subtract the exponent in the denominator from the exponent in the numerator and divide the coefficients:

(4 * 10^5) / (9 * 10^8) = (4 / 9) * 10^(5 - 8) = (4 / 9) * 10^(-3)

The result is (4/9) times 10 raised to the power of -3, or 0.000444... (repeating).