Last month, Hoa's dog ate 40 cans of dog food in 31 days. How many cans should Hoa buy to feed his dog for the next 6 days?

7.7419354839

Step-by-step explanation:

Explanation:

ok, so if Hao's dog ate 40 can's of dog food in 31 days, than therefore Hao's dog ate 4031 = 1.29 can's of dog food per day.

cut 138 centimeters off

step-by-step explanation:

250-112 = 138

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: