H0: μ = 8
H1: μ > 8
t = (8.25 - 8)/(0.8/sqrt(28)) = 1.654
t_table = 1.703
since t_calc < t_table, we accept H0, and conclude that the sample does not provide cnvincing evidence that the fertilizer had a positive impact on the weight of the corn ears at 0.05 level of significant.
2(2) + 3(3) =
4 + 9 = 13
I don't know what 90p means but basically, u have to multiply that by 3 and add it to our current total which is 13.
Then, u substract the total cost from the 20 and you should get the change.
Answer:
87 cm²
Step-by-step explanation:
there is 1 triangle and 1 rectangle in the diagram. so you have to find the area of the both polygons and sum up to find the total area of polygon
area of triangle formula:

1) area of triangle AED
base = 12 cm
height = 4.5 cm
area:

area of rectangle formula:

2) area of rectangle ABCD
length = 12cm
height = 5 cm
area:

3) area of whole polygon
= area of triangle AED + area of rectangle ABCD
= 27 cm² + 60 cm²
= 87 cm²
Answer:
Step-by-step explanation:
Researcher observes that 12 out 15 cats that approached him are males.
Therefore, number of Female Cats that approached him = 15 – 12 = 3