C and D because using the top 10% won’t show much improvement as they are all really good
Answer:

Step-by-step explanation:
The range of a projectile is given by :

Put R = 20 m, u = 15 m/s and finding the value of angle of projection
So,

So, the required angle of projection is equal to
.
The answer is y=1/4^x
If you plug in the x values, such as 2, into the equation you should get the y value. For example 1/4^2 is 1/16 which matches the table
Area is 51.0 cm2 beaches top rectangle is 35 and bottom is 16 it’s hard to explain
Answer
Find out the what is the ratio of students with pets to students without pets .
To prove
As given
of 60 students, 24 students have a pet.
Thus Total number of student = 60
students have pets = 24
students without pets = 60 - 24
= 36
Now ratio of students with pets to students without pets .

simplify the above

Therefore the ratio of students with pets to students without pets be 2:3 .
Hence proved