Hard word problem Solve the following word problems using positive and negative numbers.

Find the difference in height between the top of a hill 973 feet high and a crack caused by an earthquake 79 feet below sea level.

As top of hill means a positive value so, 973 feet.

As crack means below or lower, it has negative value so, -73 feet.

As we know that Difference means the subtraction of two numbers, so,

Therefore, the difference in height between the top of a hill 973 feet high and a crack caused by an earthquake 79 feet below sea level is 1052 feet.

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: