83. according to an article in newsweek, the natural ratio of girls to boys is 100: 105. in china, the birth ratio is 100: 114 (46.7% girls). suppose you don’t believe the reported figures of the percent of girls born in china. you conduct a study. in this study, you count the number of girls and boys born in 150 randomly chosen recent births. there are 60 girls and 90 boys born of the 150. based on your study, do you believe that the percent of girls born in china is 46.7?

yes. we do proportions in probabilities.

.25

step-by-step explanation:

what graph

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.