Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#151 2011-07-12 22:57:06

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Exponents and Scientific Notation

ok i will post back if i get a answer from her thank you for your help smile


One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

Offline

#152 2011-07-12 22:57:58

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,395

Re: Exponents and Scientific Notation

I'd like to know the 'right' answers when you get told those two (19 and 20) are right.

Maybe we'll then understand the mind of your teacher.  smile

Bob

Last edited by bob bundy (2011-07-12 22:59:53)


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

Offline

#153 2011-07-15 20:13:49

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Exponents and Scientific Notation

hey guys i would like to thank you alot i got a 10 on my lesson thank you sooooooo much for all your help


One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

Offline

#154 2011-07-15 20:15:04

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: Exponents and Scientific Notation

1. (x^3)^5
A x^-15
B x^2
C x^8
D x^15
E x^-2
F x^-8
#1- (D)
because (x^3)^5=

(x^3)*(x^3)*(x^3)*(x^3)*(x^3)=

(x*x*x)* (x*x*x)*
(x*x*x)*(x*x*x)*(x*x*x)=x^15

14. Examine the following solution to a conversion problem. Do you see a mistake? If so, identify the location of the first mistake and explain why it is incorrect.

A The conversion is not possible.

B The first problem occurs in column (1). The problem should begin with mg.

C The first problem occurs in column (2). 1 kg is not equal to 1000 g, so that should not be used as the conversion factor.

D The first problem occurs in column (2). The conversion factor is upside down (grams should be on top, and kg should be on bottom).

E The first problem occurs in column (4). The multiplication and division was performed incorrectly.

F No mistakes.

#14- is (d) because every gram is made up of 1000 milligrams 3.25 kilograms is equal to 3250 grams each of them is made up of 1000 milligrams so there are 3250 *1000=3250000

3.25 kilograms *1000= 3250 grams
the chart says 1 kilogram =1000 grams
so to get the number of grams from 3.25 kilograms i would multiply 3.25 kilograms *1000=3250
so my answer for that would be d The first problem occurs in column (2). The conversion factor is upside down (grams should be on top, and kg should be on bottom

17. Examine the following solution to a conversion problem. Do you see a mistake? If so, identify the location of the first mistake and explain why it is incorrect.

A No mistakes.
B The conversion is not possible.
C The first problem occurs in column (1). The problem should begin with L.
D The first problem occurs in column (4). The multiplication and division was performed incorrectly.
E The first problem occurs in column (3). We are not allowed to use a conversion factor of (1 L/ 1L).
F The first problem occurs in column (2). 1 L is not equal to 1000 kL, so that should not be used as the conversion factor.

#17-is F because 1kl=1000 l

not the other way around

19. Estimate the amount of juice in a typical orange juice carton in liters.

A about 8 liters

B about 5 liters

C about 4 liters

D about 3.5 liters
E about 2 liters
F about .5 liters

#19-D
i estimated it as D from a 1 liter carton that i have in the fridge

20. Estimate the weight of a small can of soup in grams.

A about 30 grams
B about 500 grams
C about 250 grams
D about 325 grams
E about 750 grams
F about 100 grams

#20- B

because a gram measures the weight of very light objects so i estimated it to be 500 grams from the can of soup that was in my refrigerator


thats the answers i submitted to her


One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

Offline

#155 2011-07-15 20:51:44

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,395

Re: Exponents and Scientific Notation

hi zee-f

You're welcome.  Thanks for supplying the final answers.

Hope the next topic is more straight forward, but post again if you need to.

Bob
(986)


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

Offline

Board footer

Powered by FluxBB