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3 years ago

Tan (25pi/2) = ___ A). 1 B). 0 C). -1 D). Undefined

Mathematics

2 answers:

adell [148]3 years ago

8 0

Undefined is the correct answer

jasenka [17]3 years ago

5 0

A.) 1
Type it in your calc. to find

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Dina and Masha start cycling on a 20 km bike path at the same time. When Dina reaches the end of the path, Masha still has 4 km

sammy [17]

Answer:

0.5 hour

Step-by-step explanation:

Given

Speed of Dina = 10 km/h

Distance = 20 km

So the time Dina taken to complete the track is:

$Speed=\frac{distance}{time}\\10=\frac{20}{time}\\time=\frac{20}{10}\\ time=2\ hours$

The time taken by Dina is 2 hours. As masha started with dina but she was 4 km of the path left to cycle,

her distance covered in 2 hours was:

$Distance\ covered\ by\ Masha\ in\ 2\ hours=20-4\\=16 km$

So we know the time and distance:

Now,

$Speed\ of\ Masha=\frac{distance}{time}\\ =\frac{16}{2}\\ =8\ kilometer\ per\ hour$

We have to calculate the time that will be needed by MAsha to complete the track:

As we know the speed and remaining distance

$Speed=\frac{distance}{time}\\8=\frac{4}{time}\\ time=\frac{4}{8}\\time=0.5\ hours$

Masha needs 0.5 hour to complete the track ..

7 0

3 years ago

Read 2 more answers

Of the 800 participants in a marathon, 120 are running to raise money for a cause. How many participants out of 100 are running

QveST [7]

Im not sure about this question but- 120% of 800 equals- 15%, so 15% could be the answer

7 0

3 years ago

What is the value of the following expression 1.8 + 0.5(y + 6) - 2 t the power of 3 when y = 14?

Vikentia [17]

Answer:

The value of given expression is 3.8.

Step-by-step explanation:

Given:

$1.8+0.5(y+6)-2^3$

We need to find the simplified value of given expression using y =14

Solution:

Now we will substitute y =14 we get;

$1.8+0.5(y+6)-2^3\\\\1.8+0.5(14+6)-2^3$

Now using PEDMAS we will first solve the parenthesis we get;

$1.8+0.5\times20-2^3$

Now we will solve the exponent function we get;

we know that;

$2^3=8$

So we can say that;

$1.8+0.5\times20-8$

Now we will solve the multiplication operation.

$1.8+10-8$

Now we will perform addition operation.

$11.8-8$

And finally we will perform subtraction operation.

3.8

Hence The value of given expression is 3.8.

3 0

4 years ago

The circumference of a circle is 43.96 feet. What is the circle's radius?

hammer [34]

Answer:

r≈7ft

Step-by-step explanation:

C=2πr (π is pi)

r=C

2π=43.96

2·π≈6.99645ft

5 0

3 years ago

Read 2 more answers

Find the other three related equations to 6+a=13 and tell me which one we could use to solve the given equation, then solve the

Anon25 [30]

Answer:

a=7

Step-by-step explanation:

6 0

4 years ago