Describe 3 different situations where you would need to know how to

Mathematics

2 answers:

Ksenya-84 [330]3 years ago

7 0

Answer:

when calculating the discounted price of an item

(You spend $42.00 on groceries, but you have a coupon for 10% off. What is the final price of your bill?)

when calculating tax

(You buy a pair of sunglasses for $49.00. The sales tax is 7%.How much do you need to pay including tax?)

when calculating the mark-up of a price

(James bought a pair of jeans for $23 . He sold it online on marks it up by 20% . How much did he profit?)

den301095 [7]3 years ago

5 0

Answer:

as your intelligence in your mind

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0.00000003 in scientific notation

tester [92]

Answer:

3× $10x^{-8}$

Step-by-step explanation:

0.00000003

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

6 0

3 years ago

Please help me with this!! :D

Sedbober [7]

Answer:

A: 90

Step-by-step explanation:

Hopefully this helps!

3 0

3 years ago

Alice has a bag of marbles consisting of 9 green marbles, 7 red marbles, 3 white marbles, and 6 yellow marbles. If she picks 2 o

olga_2 [115]

1. When solving similar problems, a tree diagram is a very useful method. Check the picture below for the solution of A:

the first pick can be either of the colors g, r, w or y, with a chance of 9/25, 7/25, 3/25 and 6/25 respectively.

After the first marble is yellow, now the second can be either of g, r, w, or y with chances 9/24, 7/24, 3/24, and 5/24 respectively.

Notice that the total number for the second choice is 25-1=24, since one is gone. In our case, one yellow, (this is why we now have 5/24)

So the P( that 1st is yellow, second is white) = (6/25)*(3/24)=3/100

B. P(both red)= (7/25)*(7/24)=49/600

C. P(1st red)=7/25
P(green, after replacement)=9/25
P(1.red,2.green)=(7/25)*(9/25)=63/625