Nina and Jo both ran a 12 km race. Nina took 1 hour 15 minutes to run the whole race.
Jo started the race 6 minutes later than Nina but caught up when they had both travelled 9 km.
If Nina and Jo both ran at constant speeds, what is Jo's speed to 2 dp?

Yoku is putting on sunscreen. he uses 2\text{ ml}2 ml to cover 50\text{ cm}^250 cm 2 of his skin. he wants to know how many milliliters of sunscreen (c)(c) he needs to cover 325\text{ cm}^2325 cm 2 of his skin. how many milliliters of sunscreen does yoku need to cover 325 \text{ cm}^2325 cm 2 of his skin?

Solve 2x+y=3 x+y=5 in substitution method

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x