Find the area of this semi-circle with radius 34cm give your answer rounded to 1dp

Area or semi circle = pi x r^2/2
= 22/7 x 34 x 34 /2
= 3631.68/2
= 1815.84
= 1815.8 cm^2 (1 d.p)

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.