A20-foot ramp is to be built from the top of a set of stairs to the ground level so that the top of the stairs is accessible to disabled patients. the ramp angle must be no more than 6°. what is the length of the ramp along the ground? round to the nearest tenth.

From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle