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expeople1 [14]
2 years ago
7

In a different plan for area​ codes, the first digit could be any number from 4 through​ 8, the second digit was either 0, 1, or

2​, and the third digit could be any number 4 except With this​ plan, how many different area codes are​ possible?
Mathematics
2 answers:
ankoles [38]2 years ago
4 0

Answer:

135

Step-by-step explanation:

But, for the last digit that is go from 0-9 except the 4

So it also depends on the range for the last digit

Hope this helped! :)

olya-2409 [2.1K]2 years ago
3 0

Answer:

135 choices

Step-by-step explanation:

5 choices for 1st dig

3 choices for 2nd dig

9 choices for third digit

5 x 3 x 9 = 135

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The figure the Floor Plan of a balcony ,it consists of △ABC and semi-circle ,
ivanzaharov [21]

Step-by-step explanation:

(a) In right triangle ABC,

AC^2 =AB^2 +BC^2  \\  =  {12}^{2} +  {5}^{2}   \\  = 144 + 25 \\  = 169 \\  AC =  \sqrt{169}  \\  \therefore \: AC =  13\: m \\  \\ AC \: is \: the \: diameter \: of \: semicircle \\  \therefore \: r =  \frac{1}{2} \times  AC = \frac{1}{2} \times 13 = 6.5 \: m \\  Circumference \:of \:semi-circle \\ C = \pi \: r = 3.14 \times 6.5 = 20.41 \:m\:

Perimeter of Balcony = 12 + 5 + 20.41 = 37.41 m

(b) Area of balcony

=\frac{1}{2}\times 12\times 5+\frac{1}{2} \pi r^2 \\\\=\times 6\times 5+\frac{1}{2} \times 3.14\times (6.5)^2 \\\\=30+\frac{1}{2} \times 3.14\times42.25\\\\= 30+\frac{1}{2} \times 132.665\\\\= 30 + 66.3325\\\\= 96.3325 \:m^2 \\\\\approx 96. 33\:m^2

8 0
3 years ago
Maureen used 0.9 meters of fabric to make a pillow. How many more pillows of this size can Maureen make with 12.75 meters of add
Basile [38]

Answer:

14

Step-by-step explanation:

12.75m/0.9m = 14

4 0
3 years ago
Plsssssss help<br>got 20 mins​<br>the question is: The sin of angle DCB is
Elena L [17]

Answer:

i. <DCB = 53.13^{o}

ii. Sin of <DCB = 0.8

Step-by-step explanation:

Let <DCB be represented by θ, so that;

Sin θ = \frac{opposite}{hypotenuse}

Thus from the given diagram, we have;

Sin θ = \frac{4}{5}

        = 0.8

This implies that,

θ = Sin^{-1} 0.8

   = 53.1301

θ = 53.13^{o}

Therefore, <DCB = 53.13^{o}.

So that,

Sin of <DCB = Sin 53.13^{o}

                    = 0.8

Sin of <DCB = 0.8

5 0
3 years ago
I need help on this.
Vadim26 [7]

Answer:

its PQ for a fact

Step-by-step explanation:

trust i nme

6 0
3 years ago
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Work out the area of a rectangle with base, <br>b<br>= 22mm and perimeter, <br>P<br>= 64mm.​
Vsevolod [243]

Answer:220mm

Step-by-step explanation:

22x2=44

64-44=20

length =10mm

10mmx22mm=220mm

4 0
3 years ago
Read 2 more answers
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