# Express y correct to 2 decimal places

• Apr 22nd 2009, 03:52 AM
Steven777
Express y correct to 2 decimal places
If y = 2392.25x0.65-26.2x3.82
0.062

Express y correct to 2 decimal places
Express y correct to 3 significant places
Express y in scientific notation correct to 3 significant figures.

I will appreciate if someone can help?

thank you
• Apr 22nd 2009, 04:20 PM
JordanW
1) 1454.88

2) 1454

3) 1.45x10^3

not sure about number 2from what you wrote as the question,
• Apr 22nd 2009, 10:17 PM
Hello Steven777
Quote:

Originally Posted by Steven777
If y = 2392.25x0.65-26.2x3.82
0.062

Express y correct to 2 decimal places
Express y correct to 3 significant places
Express y in scientific notation correct to 3 significant figures.

I will appreciate if someone can help?

thank you

My calculator gives $\displaystyle y = 23465.78225806451...$

Correct to 2 d.p. this is $\displaystyle 23465.78$
To 3 s.f. this is $\displaystyle 23500$
In scientific notation, to 3 s.f., it is $\displaystyle 2.35 \times 10^4$