Question

1) 2.1-10° +5.7-10 =​

Answer 1

2,1-10 градусов +5,7-10= -2,2-10 градусов Объяснение:

Answer 2

It seems like you're trying to perform a mathematical operation. The expression you've provided appears to involve addition and subtraction of numbers written in scientific notation. Let's break it down step by step:

1. Add the constants without exponents: 2.1 + 5.7 = 7.8

2. Combine the exponents: -10 (from the first number) + 0 (from the second number) = -10

Putting it all together: 7.8 × 10^-10

So, the result of the expression 2.1 × 10^-10 + 5.7 × 10^0 is 7.8 × 10^-10.