Because -7i and 7i are the solutions to the quadratic equation, you can first write it in factored form (x-7i)(x+7i). The you multiply this out and get x^{2} +49.

4 0

3 years ago

What is the volume of this sphere

ruslelena [56]

Answer:

3052.08 m³

Step-by-step explanation:

$\boxed{volume \: of \: sphere = \frac{4}{3}\pi {r}^{3} }$

Given that the radius is 9m, r=9.

Volume of sphere

$= \frac{4}{3} (3.14)(9^{3} )$

= 3052.08 m³

8 0

3 years ago

Read 2 more answers

c=1 when a randomly chosen card out of a standard deck of 52 playing cards is a heart and c=2 otherwise. draw a histogram showin

Lilit [14]

Answer:

The possible values of c are 1 or 2. There are 13 hearts in a deck of cards and 52-13 = 39 cards that are not. There are a total of 52 cards to choose from, so the possibilities for each value of c are found by dividing the number of results for that value by 52. (Image 1)

Histogram is attached for your reference.

8 0

3 years ago