Answer:
See answers below
Step-by-step explanation:
Given the following ratios. We are to express them in their simplest forms
15:12
= 15/12
= (3*5)/(3*4)
= 3/3 * 5/4
= 5/4
b) 42:1
= 42/1
= 42
Given that 2:x :: 4:6
2/x = 4/6
Cross multiply
4x = 2*6
4x = 12
x = 12/4
x = 3
Hence the value of x is 3
Integrating
gives

Notice that
forces all terms in the sum to be 0, so that

and hence

making the first option correct.
Answer:
False.
Step-by-step explanation:
X can not be less than 8 and also greater than 8 and the same time.