Question

microwaves are used to heat food and for some types of radar. they have wavelengths ranging from about 1 mm to 1 meter.
what is the wavelength in meters for a 1.238 cm wave?
$? \times 10^{?}$ m

Explanation:

Step1: Convert cm to meters

Recall that $1\ \text{cm} = 0.01\ \text{m} = 10^{-2}\ \text{m}$.

Step2: Calculate the value

$1.238\ \text{cm} = 1.238 \times 10^{-2}\ \text{m}$

Answer:

$1.238 \times 10^{-2}\ \text{m}$
(The first box is 1.238, the second box is -2)