You can either write 2.4 as 12/5 ( an improper fraction) or as 2(2/5) (a mixed number).
-5
a^2-25=0
a^2=25
take the square root of both sides
a=5, and -5
Answer:

Step-by-step explanation:
the information we have is:
- the radius of the circle in the base:
(u for units)
- and the height of the cone:

to find the volume we need the formula for the volume of a cone:

where r is the radius and h is the height.
Substituting the known values to find the volume:

the volume in terms of
is 
and if we substitute the value of pi:
we get:

Answer:
Option 4 is correct
Step-by-step explanation:
If the rate is compounded continuously, the formula used to find the future value is:
A= Pe^rt
Where A = Future Value
P= Principal amount
r = interest rate in decimal
t = time
For the given data:
A=?
P = $5000
r = 7% or 0.07
t = 6
Putting values in the above formula
A= 5000e^(0.07 *6)
A = 7609.81
So, Option 4 is correct.
In order to check if the lines are perpendicular, we need to check if their slopes have the following relation (to find the slope we can use the slope-intercept form y = mx + b):

A.
In this option, y = -5 is an horizontal line and x = 2 is a vertical line, therefore they are perpendicular.
B.
First let's find the slope of each line:

These slopes obey the relation stated above, so the lines are perpendicular.
C.

These slopes obey the relation stated above, so the lines are perpendicular.
D.

These slopes obey the relation stated above, so the lines are perpendicular.
E.

These slopes don't obey the relation stated above, so the lines aren't perpendicular.
The correct options are A, B, C and D.