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Topic review (newest first)

bob bundy
2011-07-16 18:51:44

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)

zee-f
2011-07-16 18:15:04

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

zee-f
2011-07-16 18:13:49

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

bob bundy
2011-07-13 20:57:58

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

zee-f
2011-07-13 20:57:06

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

zee-f
2011-07-13 20:54:43

am ganna do some googling on 19 and 20 i hope ill end up with the correct answer

bob bundy
2011-07-13 20:54:15

so do I!!!

post back to let me know.

Bob

zee-f
2011-07-13 20:53:36

yup F is what am ganna submit to my teacher i hope its correct

bob bundy
2011-07-13 20:52:37

Don't apologise.  I only did that in the edit.

Now I am sure we've arrived at the right answer.  F

Ok?

Bob

zee-f
2011-07-13 20:51:01

oooh i just saw that post sorry u answered my question

bob bundy
2011-07-13 20:49:43

whoops.  It shouldn't because that's the wrong reason.  I've edited it.  Look back.

Bob

zee-f
2011-07-13 20:49:41

but in the multi choices which one am i spouse to choose am confused on that

zee-f
2011-07-13 20:47:36

yup it dose thank you smile

bob bundy
2011-07-13 20:46:45

hi zee-f

I've posted the original diagram and my answer.

edit!

The conversion is wrong because 1kL = 1000L not the other way round. That makes it answer F.
Does that make sense?

Bob

zee-f
2011-07-13 20:38:37

ok now for #17

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.


i answered D it was incorrect

so bob bundy helped me he said the error was in the second column i need help explaining why its in the second column,

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