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3 years ago

A shopkeeper calculates that the tax on a pair of sunglasses is $2.185. What is the tax rounded to the nearest penny

Mathematics

2 answers:

IrinaK [193]3 years ago

5 0

$2.19 or 19 cents is your answer hop it helps

irina [24]3 years ago

3 0

The tax rounded to the nearest penny would be $2.19 because you would round the 5 up.

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Respuesta para-20=-4×-6×

BaLLatris [955]

-20 = -10x juntas -4x y -6x
2 = x divides -20 entre -10

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2 years ago

One thousand tonnes (1000 t, one t equals 10 cubed kg) of sand contains about a trillion (10 super 12) grains of sand. How many

Phantasy [73]

Answer with Step-by-step explanation:

Since 1 mole of sand will contain Avagadro's Number of sand particles (by definition of 1 mole)

Thus we have

1 mole of sand = $6.022\times 10^{23}$ sand particles

Thus in number of trillion sand particles we have no of trillion sand particles in 12 mole is

$\frac{6.022\times 10^{23}}{10^{12}}=6.022\times 10^{11}$

Now since it is given that mass of 1 trillion sand particles is 1000 tonnes Thus the mass of $6.022\times 10^{11}$ trillion sand particles is

$Mass=1000\times 6.022\times 10^{11}=6.022\times 10^{14}tonnes$

Part 2)

Since it is given that volume of 1 sand particle is $1.0mm^{3}$ thus the volume of 1 mole of sand is volume of $6.022\times 10^{23}$ sand particles

Thus volume of 1 mole is $V=1.00\times 10^{-18}km^{3}\times 6.022\times 10^{23}=6.022\times 10^{5}km^{3}$

Now since the Area of united states is $A=3.6\times 10^{6}mile^{2}=5.8\times 10^{6}km^{2}$

Thus the depth of the sand pile is

$Depth=\frac{Volume}{Area}=\frac{6.022\times 10^5}{5.8\times 10^6}=0.10387km=103.8meters$

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2 years ago

The complement to an angle with a measure of 53 degrees is 27 degrees.<br><br> is this true or false

Arlecino [84]

It is true
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2 years ago

How many groups of 2 can you make<br> with the 8 shapes

tino4ka555 [31]

Answer:

4 groups

Step-by-step explanation:

4 0

2 years ago

I WILL AWARD BRAINLIEST!! PLEASE HELP,!!

katen-ka-za [31]

Answer:

B. 70°

Step-by-step explanation:

If this is an equilateral triangle, then each angle is 180/3 = 60

<A = 60 = x+3x+2x

60 = 6x

60/6 = 6x/6

10 =x

Angle B will also equal 60 degrees

BDA + x + B = 180

BDA + 10 + 60 = 180

BDA + 70 = 180

BDA = 180-70

BDA = 110

BDA and y are complementary angles since they form a straight line

BDA + y = 180

110 +y =1 80

y = 180-110

y = 70

5 0

3 years ago