No they are not correct. She should be adding 5 to the next terms instead of subtracting them. i.e. -27, -22, -17, -12, ...
Multiply x times -2 then times the second number times -1
I would say that it's an acute angle ....
Answer:
12.
Step-by-step explanation:
it takes 24 days to completely cover the whole pond.
to cover half the pond, it takes an x amount of time (x is unknown) x is equal to the half of 24. That means 24 = 2x and x=12.
Volume of a cylinder = cross sectional area * height
so...
height = 3m
cross sectional area = pi × radius^2
radius = 1/2 diameter
radius = 1/2 × 6 = 3
3.14 × 3^2
= 3.14 × 9
= 28.26
therefore...
volume of cylinder = 28.26 × 3
= 84.78 m^3
