Answer:
A
Step-by-step explanation:
Answer:
x = -1, 1, -5 , 5.
Step-by-step explanation:
x4 – 26x2 + 25 = 0
Factoring:
(x^2 - 25)(x^2 - 1) = 0
So x^2 - 25 = 0 gives x^2 = 25 and x = +/- 5.
x^2 - 1 gives x^2 = 1 and x = +/- 1.
The initial population at time t = 0 was 0.39 while the size of the bacteria population after 4 hours was 6553600
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more numbers and variables.
Let y represent the bacteria population at time t. a represent the initial population at t = 0. Since the doubling period of a bacteria population is 10 minutes, hence:

At time t = 110 minutes, the bacterial population was 800. Hence:

At 4 hours (240 minutes):

The initial population at time t = 0 was 0.39 while the size of the bacteria population after 4 hours was 6553600
Find out more on equation at: brainly.com/question/2972832
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The grade is the ratio of rise to run, i.e. the slope aka the tangent.


Answer: (a) 6 degrees
For part b, the road is the hypotenuse c of a right triangle whose tangent of the small angle is 1/10. The height h or rise is the side opposite the small angle.


We could just take the sine of the angle we got but let's get it from the tangent exactly.

Dividing by squared cosine





Answer: (b) Rise of 0.199 km