7.the mass of a grain of sand is approximately 2.8×10^−11 grams
select from the drop-down menu to correctly complete the statement.
the mass of a grain of sand is approximately 2.8×10^−8
answer choices:
a. milligram
b. gram
c. killogram
explain rightnoww

Answer :- A) Milligram is the right answer.

Explanation:-

The mass of a grain of sand is approximately

We know that 1 gram=1,000 milligrams

Therefore,The mass of a grain of sand is approximately  

Thus, the  mass of a grain of sand is approximately

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17