28.23 is the volume of something if the diameter is 2 cm and the height is 9 cm.
Step-by-step explanation:
every triangle inscribed into a circle with the baseline being a diameter of the circle must be a right-angled triangle.
therefore,
angle XVY = 90°.
for VY we can use Pythagoras
c² = a² + b²
with c being the Hypotenuse (the line opposite of the 90° angle, in our case XY).
XY = 2×ZY = 2×17 = 34.
so,
34² = 30² + VY²
VY² = 34² - 30² = 1156 - 900 = 256
VY = 16
Answer:
- $5.60 sales tax
- $75.60 total cost
Step-by-step explanation:
You have correctly found the sales tax to be ...
$70.00 × 0.08 = $5.60 . . . sales tax
The total cost of the item is the selling price with the tax added:
$70.00 +5.60 = $75.60 . . . total cost