B) Use the quadratic formula to find the value of t, t? + 16 = 10t.
SECTION : B (40 Marks)
11. a) In a circle o is the centre of the circle ,given that AO=BO=CO=radius
of the circle. If the size of angle AOB = 98° what is the size of angle ACO.
b) The mass off 40 students were recorded as follows:
Mass in kg
40-44
45-49
50-54
55-59
60-64
No. of students
5
8
10
11
6
Determine : i) the mean ii) the mode
iii) the median
12. a) A figure below is a cube ABCDEFGH of side 10 cm. Find,
i) the length AG ii) the size of angle between AG and the base
ABCD.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

answer; ///progressive relaxation;

answer;

a. sheep consumption efficiency would be reduced.

explanation;

-trophic efficiency is a measure of how much energy occurs at one level divided by the energy at the level immediately below it . trophic efficiency incorporates three types of efficiency:

-the proportion of available energy that is consumed (consumption efficiency).   it is the proportion of the available biomass that is ingested by consumers.

-the proportion of ingested food that is assimilated (assimilation efficiency).

-the proportion of assimilated food that goes into new consumer biomass (production efficiency).

-in this case, the grasshoppers would affect sheep by reducing the proportion of the available biomass that is ingested by the sheep.