Answer:
50%
Step-by-step explanation:
The percent error is equal to the absolute value, difference of the measured value or your experimental value minus the actual value divided by the actual value times 100%;
Here we have;
Measured Valued = 120 pennies
Actual Value = 80 pennies
% error = 
% error = 
% error = 
% error = 
% error = 50%
So, 50% is the percent error for Diego
Answer:
w = 7 cm
Step-by-step explanation:
Volume = 252 cm³
Height, h = 3cm
Let width = w
Length, l = w + 5
Volume of rectangular prism, V = l * w * h
252 = (w + 5) * w * 3
252 = (w + 5) * 3w
252 = 3w² + 15w
3w² + 15w - 252 = 0
w² + 5w - 84 = 0
w² + 12w - 7w - 84 = 0
w(w + 12) - 7(w + 12) = 0
(w + 12) = 0 or (w - 7) = 0
w = - 12 or w = 7
w cannot be negative
Hence, w = 7 cm
2/3 * 1/2
Multiply straight across
2*1 = 2
3*2 = 6
2/6 = 1/3
Answer: 1/3
Percent error=|

| times 100
(note the || is absolute value, means that whatever the result is inside, it is made positive)
predicted value=261
actual value=293
subsitute
percent error=|

| times 100
so using pemdas
do parenthasees first
|

|
|-0.12|
absolute value
0.1226
time 100
0.1226 times 100=12.26
answer is 12.26%
answer is B