You are dividing look at the problem closely
25% of $75.50 is 18.87, so.... you would save $18.87
Answer:
200 seconds is equal to 3 min and 20 sec
It shouldn't add up to 180 degrees, you're looking for the length of the sides not the degree of the angle. Because it's an equilateral triangle, all sides are the same, so you can just set them equal to each other. D=5
Answer:

And we want to find the following probability:

And for this case we can use the cumulative distribution given by:

And for this case if we use this formula and the complement rule we have:

Step-by-step explanation:
Let X the random variable who represent the pizza delivery time and we know that the distribution for x is given by:

And we want to find the following probability:

And for this case we can use the cumulative distribution given by:

And for this case if we use this formula and the complement rule we have:
