1. By using decimal multipliers, calculate the following, giving your answer to the nearest
penny/cent: (and showing the multiplication you
use)
a. 13% of £56
b. 74% of £3.20
C. 130% of £77.10
d. 31% of £8.41
e. 1.5% of £75
f. £80 after an increase of 20%
g.
£35 after a decrease of 10%
h. £46 after an increase of 2%
i. £103 after a decrease of 30%
j. £70 after an increase of 5.5%
k. $840 after an increase of 125%

3432532

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

step-by-step explanation:

its c