Answer:
Step-by-step explanation:
Given statement:
A fourth of a number added to -45 is -11
To find the number.
Solution:
Let the number be =
The given statement can be transformed mathematically as:
Solving for .
Simplifying by removing parenthesis.
Multiplying each term by 4 to remove fractions.
Adding 180 both sides.
∴
Thus, the number = 136
Do the area of the circle as a whole minus (72/360 x radius^2) and then minus the other grey area.
Answer:
Step-by-step explanation:
The formula is
which models the exponential function
where a is the initial amount of whatever it is you have (in our case it's bacteria), b is the growth rate (ours is 4 which means that every day the number from the day before increases by a factor of 4), and x is the number of days. We plug into the formula the values we have, starting with x = 1:
Always raise what's inside the parenthesis first, then multiply in the 45. 4 to the first is 4, and 4 multiplied by 45 is 180. After the first day, there are 180 bacteria present in the culture.
Next, x = 2:
which simplifies to
y = 45(16) so
y = 720.
Next, x = 3:
which simplifies to
y = 45(64) so
y = 2880
Answer:
marla is 180m from the info center and she walked 240m from the parking lot to the lake