I need help with 15 a

Answers

Answer 1

Answer: 1:4 to 2:6

hope this helped!

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You bought a sandwich for 12.40 it includes the tax 5% what is the cost of the sandwich before tax?

Answers

Answer: $11.81✔️cost of the sandwich before tax

Step-by-step explanation:

Let C = cost before tax

Cell phone costs = C + C·5% = $12.40

C(1 + 0.05) = $12.40

C = $12.40/1.05 = $11.81 , cost before tax

Answer: $11.81✔️ cost of the sandwich before tax

Checking

Cell phone after tax = $11.81 + $11.81·5/100

Cell phone after tax = $11.81 + $0.59 = $12.40✔️checked!

Spymore

Plz help me i dont understand

Answers

Answer:

m∠S = 62°

Step-by-step explanation:

Complementary angles are the sum of both angles that sum up to 90°. In the problem we have the measurement of m∠R = 28° and we are looking for the measurement of m∠S.

To find the value of m∠S, we need to subtract the total of a right angle which is 90°.

90° - 28° = 62°

So 62° is the angle of m∠S.

The two angles together create a right angle. Let's check if we got the right answer by adding both the angles together.

m∠R = 28° and m∠S = 62°

28° + 62° = 90°

PLEASE SOMEONE HELP AND EXPLAIN THE FIRST ONE PLEASE SO THE HALF LIFE OF A RADIOACTIVE KIND OF POTASSIUM IS 12 HRS . HOW MUCH WILL BE LEFT AFTER 36 HRS, IF YOU START WITH 64 GRAMS OF IT? SO I DID A=64(1/2)^36 POWER IS THAT THE ACCURATE FORM PLEASE I NEED HELP ASAPBTW THIS IS EXPONENTIAL DECAY

Answers

Don't get carried away with the exponent.

The exponent is not the number of years or the number of hours.
The exponent is the number of half-lifes.

In this one, the half-life is 12 hours, and they want to know
how much is left after 36 hours. 36 hours is 3 half-lifes.
The formula that you did is beautiful and almost perfect.
Just change that ugly exponent to the number of half-lifes (3)
and the answer will jump out at you.

half life formula is
F=P(1/2)^(t/h)

F=furure or ending amount
P=present amount
t=time elapsed
h=time the half life is

F=64(1/2)^(36/12)
F=64(1/2)^(3)
F=64(1/8)
F=8 grams

A class 4 truck weighs between 14,000 and 16,000. What is the weight range in tons?

Answers

a ton is 2000 pounds. so it would be between 7 and 8 tons

Answer:

7 and 8 tons

Step-by-step explanation:

Identify describe and extend each pattern 64,55,46,37,28,19

Answers

you subtract 9 each time. 10, 1, -8, -17, -26

You are subtracting 9 each time, or, if you are a visual learner, an easier way to understand it could be that the left digit always goes down 1 and the right digit goes up 1. So because of the found pattern, the next numbers would be 10...1...-8...-17...-26...-35...-44...-53... And so on. Something to remember is that when you start getting into the negative numbers, the visual pattern goes vice versa. The left number goes up 1, and the right number goes down 1, when there are negative numbers. Whereas for positive numbers, left goes down 1, and right goes up 1. If you don't get what i am saying, stare at it long enough and you'll then understand what I am meaning lol. Hope I helped!! Rate five and mark brainliest if you don't mind!!

What's the expanded form 310409

Answers

In expanded form, 310409 would be 300000+10000+400+9
Unless you want it as
3*100000+1*10000+4*100+9
Or even
3*10^5+1*10^4+4*10^2+9

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