Answer:
Slope = -4
Step-by-step explanation:
y = -4x + 7
Gradient is -4 thus slope is 4
Answer:
13.9 ft
Step-by-step explanation:
use Pythagoras theorem
surface²=7²+12²
surface²=193
surface=√193=13.89 ft≈13.9 ft
please mark brainliest
Answer:
A(x) = 6.2 - 0.005x
Step-by-step explanation:
If you think about it, either 0.5/0.005 needs to be equal to 0.5%
0.5 is the same as 1/2 and therefore it is the same as 50%
So it must be 0.005!
Tip: I always just divide by 100 to get the decimal, it is a nice, easy and quick method
First you need to find the area of the plate.
The formula for the area of a circle is Area = pi *r^2
The radius (r) is given as 6 inches.
We will use 3.14 for pi
Area = 3.14 x 6^2
Area = 3.14 x 36
Area = 113.04 square inches.
Now to find the density, divide the total bacteria by the area:
Density = 120,000 / 113.04 = 1061.57 which rounds up to 1,062 bacteria/ square inch.
