Factorise fully and show working out (3)

The angle of depression from the top of the tree to the tip of the shadow is 25°. find the height of the tree to the nearest tenth. a. 16.8 feet b. 18.2 feet c. 23.4 feet d. 39.7 feet

Summary statistics given for independent simple random samples from two populations. use the pooled t-interval procedure to obtain specified confidence interval. x1=71.6, s1=3.9, n1=11, x2=67.9, s2=3.4, n2=9 determine a 99% confidence level.

What is the point-slope form of the equation for the line with a slope of  −2  that passes through the point  (4,−6)? a.y−6=−2(x+4)b.y−4=−2(x+6c.y+6=−2(x−4)d.y=−2x−6