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-BARSIC- [3]
3 years ago
8

What is the name of this unstable isotope from number 10?

Mathematics
1 answer:
marishachu [46]3 years ago
5 0

Answer:

oxygen-13

Step-by-step explanation:

Consists of 8 protons and electrons and 5 neutrons

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Please help me. Noura is redecorating her house. She needs to work out the area of the wall around her triangular window in orde
Vinvika [58]

Answer:

a. 277.3 m²

b. $307.86

Step-by-step explanation:

a. Area of the wall to be painted = area of rectangle - area of triangle

= L × W + ½×a×b×sin θ

L = 17 m

W = 14 m

a = 8.7 m

b = 9.5 m

θ = 72°

Plug in the values into the equation

Area of the wall = (17×14) + (½*8.7×9.5×sin 72)

Area of the wall = 238 + 39.3024105

Area of the wall to paint ≈ 277.3 m²

b. 20 liters of paint of 1 container cost $21.99

If 1 liter of paint covers 1m², therefore,

277.3 m² will need = 277.3 × 1 = 277.3 liters of paint.

20 liters = 1 container of paint

277.3 liters = 277.3/20 = 13.865 ≈ 14 containers

1 container = $21.99

14 containers = 21.99 × 14 = $307.86

8 0
3 years ago
Solve for the roots in simplest form using the quadratic formula:<br> x2 – 14x = -33
lord [1]

Answer:

i think its x = 11 , 3

Step-by-step explanation:

7 0
3 years ago
Solve 4X^2+7 = 8X +4 by using the quadratic formula
Sergio [31]

Answer:

(1.5,0)

(.5,0)

Step-by-step explanation:

Quadratic formula below

We first need to move everything to one side of the equation

4x²-8x+3=0

Then plug everything in

(8±√(-8²-4*4*3))/(2*4)

(8±√16)/8

To calculate the ± we need to do when where it's adding and then negative

we have

(8+4)/8=3/2

and hten

(8-4)/8=1/2

4 0
3 years ago
Explain how to model the division of –24 by –4 on a number line.
Allushta [10]
-24 would be on the far right and then -4 would be closer to zero
8 0
3 years ago
247÷10^2 and 247 ×10^2
Shalnov [3]
PEMDAS:
247/100 = 2.47
247* 100 = 24700
*You must ALWAYS apply the exponents first, THEN divide the equation.
7 0
3 years ago
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