Here are the four numbers. Keep them in this order:
18 2 4 3

Here are the tools in your toolbox:
parentheses, exponents (squared and cubed), multiplying, dividing, adding and subtracting.

Using the tools above, insert them between the numbers above to create the given values. Operations
may be used twice if necessary. Not all operations will be used in each expression.

Here is an example:
10 = 18 2 + 4-3

Listed below are the values you need to create
21 =
67 =
-6 =
103 =

21 = (18+4+18+2)/2

67 = (18*4+18+18+18+4+4)/2

-6 = (18+2)+4+4+2-18*2

103 = 18*4+18+2+4+3+4

13

step-by-step explanation:

distance formula is d=√(x2-x1)^2   +   (y2-y1)^2

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.