Dan used 942 units of electricty from july to october. the meter reading in july was 32347 units. a)work out the meter reading in october. b)each unit costs 14p. how much do 942 units cost?
working out !

given information:

dan used 942 units of electricity from july to october.

the meter reading in july was 32347 units.

asked:

a)work out the meter reading in october.

b)each unit costs 14p. how much do 942 units cost?

> suppose that the total no. of units used will be divided equally to the months of july, august, september, and october. so, we have 942 units divided by 4 months is 235.5 units. each month, dan used 235.5 units.

now, let us work for each reading. since it is said that july has 32347  units, we will add 235.5 units so we can have the meter reading for august. same goes with the rest of the months. 235.5 units is added on each result of the previous month.

say,

month       previous  reading       present reading   units used  

july           32111.5                         32347                      235.5

august     32347                           32582.5                   235.5

september 32582.5                     32818                       235.5

october       32818                         33053.5                   235.5

a) therefore, october has a meter reading of 33053.5   units. we should indicate the previous reading of the month so that we can calculate how much units of electricity is used up.
b) multiply 942 units with 14 so we can calculate the cost of 942 units.

            942 x 14 is 13, 188

1. sometimes

2.   never

3   .08c = 7.50+.05c   250 pages

step-by-step explanation:

1.   sometimes

the theoretical probability of rolling a 1 is 1/6.   perhaps you got really lucky and never rolled a 1   in those 60 times.   your experimental probability is 0.   or perhaps you rolled a 1   20 times.   your experimental probability is 20/60 is 1/3.     it really just depends on how you rolled in that experiment.

2.   never

the probability of the event occurring is 1.   that is being 100 % sure it will happen.   that is the maximum amount of confidence we have.

3.   no customer card cost:   .08 times number of pages

customer card cost:   7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250  

the cost is the same at 250 pages