E 70 m
с
Diagram NOT
accurately drawn
D
110 m
90 m
A
150 m
B
The shape ABCDE is the plan of a field.
AB= 150 m, BC= 90 m, CD=70 m and EA = 110 m.
The comers at A, B and C are right angles.
Work out the area of the field.

Acoin is tossed twice. let e e be the event "the first toss shows heads" and f f the event "the second toss shows heads". (a) are the events e e and f f independent? input yes or no here: yes (b) find the probability of showing heads on both toss. input your answer here: preview

Write two subtraction equations that are equivalent to 5 + 12 = 17.

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.