EVERYONE IT'S A TEST! 36 POINTS TO WHOEVER ANSWERS PLEASE HELP!! Mrs. Alberts has taught seventh grade math for thirty years. Every year she calculates and records the class average on the final exam. The following dot plot represents these average scores from the past thirty years.
What percent of the scores lie within one mean absolute deviation (either way) of the mean? Round to the nearest percent and express your answer as a numerical value.
Note: Use the rounded mean and mean absolute deviation.

[ ] %

2

Step-by-step explanation:

89.633333333333

Mean Absolute Deviation (MAD): 2.0755555555556

rounding these both you get 90 and 2.

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

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.