D) 48
2 packs of plates is 48 plates and 3 packs of cups os 48 plates.
Answer:
1 seconds after being thrown, the stone reaches its max height
Step-by-step explanation:
The parabolic (quadratic) equation is:

Lets expand this in the form
, so we have:

We can say the values of a,b, and c, now to be:
a = -5
b = 10
c = 40
The number of seconds at which the max would occur is given by the point, x, at:

We know a and b, let's find the seconds, x,

Hence,
1 seconds after being thrown, the stone reach its max height
Equation: a^2 + b^2 = c^2
18^2 + 16^2 = c^2
324 + 256 = c^2
C^2 = square root 580
Square root 580 reduces to 2 square root 145.
As a decimal that is: 24.08
Rounded to the nearest tenth: 24 inches.
I hope this helps! If it does please offer me the brainiest!
Answer:
170°
Step-by-step explanation:
To convert from radians to degrees
degree measure = radian measure ×
, thus
degree =
× 
Cancel π on numerator/denominator and 18/ 180 by 18
degree measure = = 17 × 10 = 170°