Acondominium building has 25 condo units. each unit has 5 windows. ryder said that there are 125 windows altogether.

which estimate can be used to see if ryder’s answer is reasonable? is ryder correct?

a.
30 × 5
the answer is not reasonable. ryder is not correct.

b.
30 × 5
the answer is reasonable. ryder is correct.

c.
30 ÷ 5.
the answer is not reasonable. ryder is not correct.

d.
30 + 5.
the answer is reasonable. ryder is correct.

Use addition and subtraction to simplify the following polynomials. a. add polynomials: (3 – 4x + 8x^2) + (–6 + 2x – 5x^2) step 1: rewrite the polynomials without the parentheses. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial. b. subtract polynomials: (3x – 5 – 7x^2) – (–2 + 6x^2 – 5x) step 1: rewrite the polynomials without the parentheses. remember to multiply each term in the second parentheses by –1. show your work. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial.

What is the definition of exponential decay?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?