Answer:
Step-by-step explanation:
Here a score is considered to be "unusual" if higher than 2 std. dev. from the mean OR lower than 2 std. dev. from the mean.
Thus, any score lower than (120 - 2[12]), or 96, or higher than (120 + 2[12] ), or 144, is considered to be "unusual."
Answer:
a) To increase 160 by 4% we multiply by 1.04
b) To decrease 160 by 6% we multiply by 0.94
Step-by-step explanation:
a) Here we have to increase 160 by 4% we are to note that;

Therefore, increasing 160 by 4% is to add additional 0.04×160 to 160
That is 160 + 0.04×160 = 160×(1 + 0.04) = 160×1.04
Therefore Sue should have multiplied 160 by 1.04 to increase 160 by 4%.
b) Here to decrease 160 by 6%, we subtract 6% of 160 from 160 that is;
Decrease 160 by 6% = 160 - 160×0.06 = 160×(1 - 0.06) = 160 × 0.94 = 150.4
Hence to decrease 160 by 6% we multiply by 0.94.
Answer:
2
2x - 8 = -8bx
hope it helps
Step-by-step explanation:
6-8
=2
Answer:
the answer for a is 0.045
Answer:
Step-by-step explanation:
Ratio: 2:4:5
Sides are : 2x , 4x , 5x
Second side = 56 cm
4x = 56
x= 56/4
x = 14
2x = 2*14 = 28 cm
4x = 4*14 = 56 cm
5x = 5*14 = 70 cm
Perimeter = 28 + 56 + 70 = 154 cm