Please check these
25. If a dress were 20% off of the marked price of $32.00, how much would it cost?
$25.60
26. Write 1,000,000,000 in scientific notation
1.0 x 10^9
27. (3.0 x 10^2) x (2.0 x 10^6) = ?
6.0 x 10^-4
25 is correct.
I think 26 is correct.
I have no idea about 27!!
27 is correct.
To verify the answers:
25. To find the cost of the dress after a 20% discount, we need to calculate 20% of $32.00 and subtract it from the original price.
20% of $32.00 = (20/100) * $32.00 = $6.40
Subtracting $6.40 from $32.00 gives us the discounted price of the dress:
$32.00 - $6.40 = $25.60
So, the cost of the dress would be $25.60. The given answer of $25.60 is correct.
26. Scientific notation represents very large or very small numbers using powers of 10. To convert 1,000,000,000 to scientific notation, we need to count the number of decimal places we need to move to represent the number as a value between 1 and 10.
1,000,000,000 = 1.0 * 10^9
So, the given answer of 1.0 x 10^9 is correct.
27. To multiply numbers in scientific notation, we multiply the coefficients and add the exponents.
(3.0 * 10^2) * (2.0 * 10^6) = (3.0 * 2.0) * (10^2 * 10^6) = 6.0 * 10^8
However, the given answer of 6.0 x 10^-4 is incorrect.
So, the correct answer for (3.0 x 10^2) x (2.0 x 10^6) is 6.0 x 10^8.