L
fatima evaluated the expression -1
when m=-2 and n=4. her work is shown below.
4m 3n-2
m-1
-4m 2-3
= 4(-2)2(4)-= (-8) ? (4) -
what was fatima's error?
she subtracted the exponents incorrectly when simplifying the expression
she substituted the wrong values for the variables.
she applied the exponent-2 to 4-2) instead of applying the exponent to just-2
she found an incorrect value for (-8)-2 since the value should be negative.

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.