A ladder is placed against a vertical wall at an angle of 45° to the horizontal. If the foot of the ladder is 2.5m away from the wall, how high up the wall does the ladder reach?

Forming a triangle using the 45 degree angle both the horizontal and vertical dimensions need to be identical.

The horizontal dimension is given as 2.5m , so the vertical dimension also has to be 2.5m.

Can calculate it as:

Tan(45) = vertical/ horizontal

Tan(45) = x/2.5

Tan(45) = 1

1 = x/2.5

X = 2.5/1

X = 2.5

this story was prepared by jim

mccullaugh in los angeles and

al stewart in new york.

new york the colossal success of "top gun" appears to have dramatically altered madison avenue's

perception of corporate sponsorship

of home video projects.

the paramount home video re- lease, featuring a 60- second diet

pepsi spot, was by no means the

first prerecorded video to carry an advertiser's plug, but it was the

first major theatrical release to do so. in the aftermath of the title's

success, paramount is widely ex- pected to ink a similar deal for

"crocodile dundee" or "star trek

iv" or both.

corporate america's new attraccds push british

recording sales

to 19% gain

london fueled by the compact

disk boom, the value of u.k. manu- facturer shipments of recordings

rose 19% in the 12 -month period ended march 1987, according to the

british phonographic industry.

total value of u.k. shipments for

the period was $755 million for all

configurations. (all value figures

are based on an exchange rate of

$1.68 to the pound sterling.)

cd sales totaled 10.7 million units

worth $121.3 million- compared

with 3.7 million units worth $39.5

million in the prior 12 months -and

accounted for two -thirds of the

overall gain in trade value. at present growth rates, says the bpi, cd

sales for calendar 1987 will reach 20

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step-by-step explanation: