The answer is 28 !!!!!!!!!!!!!!!!!

<u>Answer:</u>
The solution to the equation is: <u>±</u><u>2</u><u>.</u>
Hope you could get an idea from here.
Doubt clarification - use comment section.
You will need three roots for this, so we have
Let x = -30, -10 and +20
So the factors will be (x+30)(x+10)(x-20)
The divide it to 100, this will help bring the peak up and down
So the polynomial function R(x) will become
1/100 * (x+30)(x+10)(x-20)
R(x) = 1/100 * (x+30)(x+10)(x-20)
Finding the X-intercept:
Let R(x) = 0 and solve for x.
1/100 * (x+30)(x+10)(x-20) = 0
x = -30, -10, 20 are the x-intercepts.
Answer:
There is no insufficient sufficient evidence to support the claim that the rate of polio is less for children given the vaccine than it is for children given a placebo.
Answer:
a = 15
b = 7
c = 4
Step-by-step explanation:
Given in the question an expression ![\sqrt[4]{15}^{7}](https://tex.z-dn.net/?f=%5Csqrt%5B4%5D%7B15%7D%5E%7B7%7D)
This expression can be written as 
As we know that roots are most often written using a radical sign, like this,
But there is another way to represent the taking of a root.
You can use rational exponents instead of a radical. A rational exponent is an exponent that is a fraction. For example,
can be written as 
Secondly two powers having same base can be multiply
