10-139. Cheryl is playing a game with her brother. They toss four coins and Cheryl wins every time an equal number of heads and tails appear.

a. Is this a fair game? Make a conjecture.

b. What is the probability that Cheryl wins?
For

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?