Using the equation: h2 = 625, what is h, the square root of 625?
A 25
C25 and -25
B -25
D none
25
-25
25 and -25
none

When you arrive at the lake, your friend realises he hasn’t got any swimming trunks. you need to ride to a sports shop. the sports shop is 8350 metres away. how many metres is it to cycle there and back?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Issof claims that the scale factor is 1/2. which statement about his claim is correct