Jean is building a plastic model of a car. The instructions state that 9/10 of an ounce of glue is required to complete the model. Jean has purchased tubes of glue from the hobby shop, each of which contains 1/5 of an ounce of glue. Use these fractions to create an expression for finding how many tubes of glue Jean will use to build her model. Then, find the solution to the expression.

if x = 1, then the answer is 3.5

answer:

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.