Elena wants to make a scale drawing of her bedroom. Her bedroom is a rectangle with length 15 feet and width 9 feet. She decides on a scale of 1 cm to 3 feet. Draw a scale copy of Elena's bedroom using the scale of 1 cm to 3 feet. Let each box on the grid below represent 1 cm.

The drawing should be 5 in length and 3 in width

Step-by-step explanation:

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.

total of apples - take away four

6-4 = 2

answer is 2 apples