Can some one do these 8 problems for me please thank you!

1. 2(-6)-10+10= (-12)

3. (4)(-1)=(-4)

5. 10+(-1)=9

7. 2²-7+7=2²=4

9. (-7)²-2²=49-4=45

11. 6(-10)+(-10)+5=(-70)+5=(-65)

13. (-4)²+(-1)²+2=16+1+2=19

15. Cant tell what r is

Step-by-step explanation:

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: