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4 years ago

PLS help and explain these problems

Mathematics

1 answer:

vichka [17]4 years ago

6 0

For 19 I got z=15. And for 20 I got k=8.6

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The angle which is less than 90 degrees is called?

BlackZzzverrR [31]

Answer:

An acute angle is an angle less than 90°

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3 years ago

Read 2 more answers

Use the graph to find the limit (if it exists). If the limit does not exist, explain why.

Mandarinka [93]

Answer:

the limit does not exist

Step-by-step explanation:

As x approaches π/2 from below, tan(x) approaches +∞. A x approaches π/2 from above, tan(x) approaches -∞. These two limits are not the same, so the limit is said not to exist.

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For a limit to exist, it must be the same regardless of the direction of approach.

6 0

3 years ago

Which of the following is a rational number? I give 20 pts!

LenKa [72]

Answer:

It's b. 100

Step-by-step explanation:

10 x 10= 100 = rational number, other include a series of numbers that cannot be written down.

Sorry if this is wrong hope I did the math right. :)

4 0

3 years ago

For her presentation on the Wonders of the World, Mary baked a square pyramid-shaped cake as pictured below. The slant height of

mihalych1998 [28]

Answer:

$V=196in^3$

Step-by-step explanation:

The volume of a pyramid is:

$V=\frac{A_{b}h}{3}$

where $A_{b}$ is the area of the base and $h$ is the height (the perpendicular measurement between base and highest point, not the slant height)

Since the base is a square, the area is given by:

$A_{b}=l^2$

where $l$ is the length of the side: $l=8in$ , thus:

$A_{b}=(8in)^2\\A_{b}=64in^2$

Now we need to find the height, for this we use the right triangle that forms with half of a square side (8in/2 = 4in), the slant height (10in), and the height.

In this right triangle, the slant height is the hypotenuse, the leg 1 is the unknown height, and leg 2 is half of the square side.

Using pythagoras:

$hypotenuse^2=leg1^2+leg2^2$