PLEASE HELP!! this is due soon and i rlly need help explanation = brainliest

The radius of a circle is 3 kilometers. What is the area of a sector bounded by a 90° arc?
give the exact answer in simplest form.

Solve -2(4y + 6) = 52. 5 -5 8 -8 and !

Marking brainliest rewrite the equation x = 65 - 60p by factoring the side that contains the variable p.

Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. use a significance level of 0.05. r=0.105, n=15 a: critical values: r= +0.514, no significant linear correlations b: critical values: r= +0.514, significant linear correlation c: critical values: r= +0.532, no significant linear correlation d: critical values: r= 0.514, no significant linear correlation will mark brainliest !