Answer:
120
Step-by-step explanation:
So 10% <em>of</em> a number (let's use n) is 30.
The key word "of" tells us we need to multiply. Therefore, 10% times n is 30:
10% is the same as 0.1. So:
Divide both sides by 0.1:
So, our number is 300.
To find 40% of 300, multiply 0.4 and 300. Thus:
Our answer is 120.
And we're done!
Answer:
None of the options are correct
Step-by-step explanation:
Given
Required
The roots of the function
Since the function is a quadratic function; to get the roots of the function, f(q) must be equal to 0
becomes
Make the subject of formula
Rearrange
Take square roots of both sides
Expand the square root of 125
q = ±5
Split into 2
or
or
Hence, the roots of the quadratic function are or
