An astronomy club wants to buy six new eyepieces for their telescope. four of the lenses cost $53.98 each. two lenses cost $21 each. what is the total cost? also, show your work and tell me how you got that answer.

239.92

Step-by-step explanation:

53.94×4=215.92

Then you do 21×2=24 then you take the 215.92 and the 24 and add them together and it gives you 239.92

The magnification of a telescope is the ratio of its focal length to the focal length of the eyepiece in use. Thus a telescope with a 1000 mm focal length, used with an eyepiece of 25 mm focal length, has a magnification of 1000 / 25, or 40. It makes things look 40 times wider, or if you prefer, 40 times closer.

solution:

we have to construct

∠m nt ≅ ∠p qr

the steps to draw this construction are

step 1: use a compass to draw an arc from point q which intersects the side pq at point a and the side qr at point b.

step 2: draw a segment nt and use the same width of the compass to draw an arc from point n which intersects the segment nt at a point x.

step 3:

step 4: join points n and y using a straightedge.

step 3:

option (d).maintaining the same width of the compass as ab, draw an arc from point x such that it intersects the arc drawn from n in a point y.

to draw   congruent angles , 1. width of compasses while drawing two angles should be same i.e from point at which angle has to be drawn, 2.the distance between the two points where the compass intersects the two sides should be same while drawing any two congruent angles.

answer is b

step-by-step explanation: