Someone please HELPP me

a, b, c, and e

Step-by-step explanation:

Just by looking at the number of minus you can determine whether the product is either positive or negative. If there is an even number of minus then the product will be positive, and if there is an uneven number of minus, the product will be negative.

negative * negative=positive

negative*positive=negative

positive * positive=positive

For example A.-

(4)(-0.5)(8)(-2/4)

Cancel the common factor of 4.

Move the leading negative in -2/4 into the numerator.

4((-0.5)*(8))-2/4

then cancel the common factor which in that case is 4.

now we are left with.

(-0.5) * (8) * -2

Multiply. -0.5 * 8=-4

-4 * -2=8

correct answer:

i^31 = -i

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

click to let others know, how is it

0.0

0 votes

1

report

read more on -

step-by-step explanation: