Question

Substitue I=100 r=0.01 t=1/2 into the formula for simple intrest and solve for P

I=Prt
100 =P(0.01) (1/2)
100= P(0.05)
2,000=P multiply and solve for p

I know how to get everything but the 2,000. Need the forumla on what they are multiply and how they are multiply to get the 2,000

Answer 1

let see you divided both sides by 0.05 giving you 100=P*(1/100)(1/2)
100=P*(1/200)
2000=P by multiplying 200 on both sides

Answer 2

still kinda lost sorry

Answer 3

or what would problom look like when divied

Answer 4

do you know .01=1/100?

Answer 5

Examples: 1/10=.1, 1/100=.01, 1/1000, .001, 1/10000=.0001 so on....

Answer 6

yea i know that

Answer 7

ok do you know how to multiply 1/100 * 1/2

Answer 8

=(1*1)/(100*2)=1/200

Answer 9

to multiply fractions you multiply straight across on the numerator and then for the denominator like I did above

Answer 10

Since we are trying to get P by itself and it is being multiplied by that 1/200 to undo this multiplication we multiply by the multiplicative inverse of 1/200 to get the multiplicative identity 1. The multiplicative inverse of 1/200 is just its reciprocal which is 200. So we multiplied by 200 to get the multiplicative identity. The multiplicative identity times any number will be that number since the multiplicative identity is 1. But since we multiply 200 on one side we have to do it to the other side of the equation

Answer 11

any questions?

Answer 12

nope thanks alot

Answer 13

really you're good?

Answer 14

isn't the word multiplicative cool?

Answer 15

say yes. you know you want to

Answer 16

yes

Answer 17

lol, random

Answer 18

i had the hardest time saying that word, and I finally got it. I used to couldn't say it

Answer 19

lol
well not really i man i kinda get the problem but i mean

Answer 20

I like to change everything to fractions, but you could have left it "deciamly"

Answer 21

decimaly*

Answer 22

yea i show you next problem and then show you what i think then can maybe walk me throw it lol
like i have done others on here before lol

Answer 23

i will show you problem

Answer 24

k bring it

Answer 25

there is a screen shoot of the problem

Answer 26

i know that the fraction will be 3/4

Answer 27

because 9/12=0.075 wich is 3/4 in fraction

Answer 28

are you talking about your P is 3/4? If so, then thats incorrect

Answer 29

so i will take 0.04 (3/4)

Answer 30

t

Answer 31

becasue be 9 /12

Answer 32

Our formula for interest is I=Prt where r=4% and t=9 and I=42 and they ask us to solve for P. Let me see you plug those in

Answer 33

okay give me sec

Answer 34

k

Answer 35

I=42,r=0.04,and t=9/12=3/4 thats what i got so far

Answer 36

and in terms i will have

Answer 37

I=prt
42=(0.04)(3/4)
42=P(0.03)
then how will i caculate to get P

Answer 38

I thought t=9? let me look again

Answer 39

t=9 not 3/4

Answer 40

i will show you an exapmle it gives me how to do problem

Answer 41

same problem with exapmle beside it

Answer 42

but say's got to divide 9 by 12 months

Answer 43

oh i didnt see the month thing sorry

Answer 44

yes there are 12 months so the time will be 9/12 gj

Answer 45

wich means will be 0.075 in dec and 3/4 in fraction

Answer 46

3/4=.75

Answer 47

yea

Answer 48

I=prt
42=(0.04)(3/4)
42=P(0.03)
do i got to divide the 0.04 and (3/4)

Answer 49

yes so far correct

Answer 50

but if i divide i will get 0.05

Answer 51

if i divide 0.04 and 3/4

Answer 52

get 0.05 right

Answer 53

since we should be multiplying those we get .03

Answer 54

all i get it

Answer 55

now thats so crazy lol

Answer 56

then i take 0.03/42 and that =P

Answer 57

i mean *

Answer 58

42/.03

Answer 59

=140

Answer 60

thats crazy i been working on problem couple days and all i need to do lol

Answer 61

1400

Answer 62

i knew how to work problem

Answer 63

thanks for all your help man thanks alot

Answer 64

ur welcome

Answer 65

maybe can help me with couple more

Answer 66

i wirked on i got most of problem but can figure certin ones out

Answer 67

parts of them

Answer 68

k

Answer 69

like i get
33.25
______
1900 (3/13)
make r=

Answer 70

3/12

Answer 71

yes looks good

Answer 72

the first one does. did you want me to check the other two or something?

Answer 73

what was your strategy for the next one?

Answer 74

the frist two are good what i am having trouble with is the intrest rate

Answer 75

actual intrest

Answer 76

what is the formula for actual interest?

Answer 77

look at the example shows how to get the actual interrest

Answer 78

i know how to do problem but like when i divide then top by botton and add the bottem times ther fraction not sure i am doing ti right

Answer 79

so r=I/(Pt)=33.25/(1866.75*3/12)

Answer 80

i will bbl maybe

Answer 81

lol