John Carter is standing on a low hill on Mars and he throws a spear at an oncoming enemy tribesman. The tribesman is on the level plain 53 feet below him. The spear follows the function H(t)=-6.1t2+42.7t+53. How many seconds after he releases the spear does it start to descend towards its target? (i. e. when does it reach its highest point?)

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Agroup of randomly selected apple valley high school students were asked to pick their favorite gym class. the table below shows the results of the survey. there are 528 students at apple valley high school. gym class number of students racquet sports 1 team sports 9 track and field 17 bowling 13 based on the data, what is the most reasonable estimate for the number of students at apple valley high school whose favorite gym class is bowling? choose 1 answer a. 9 b. 13 c. 119 d. 172