algebra
posted by KB .
A homeowner wishes to insulate her attic with fiberglass insulation to
conserve energy. The insulation comes in 40cm wide rolls that are cut to fit between the rafters in the attic. If the roof is 6 m from peak to eave and the attic space is 2 m high at the peak, how long does each of the pieces of insulation need to be?
Round to the nearest tenth.
if the roof of the house is 7 m from peak to eave and the attic space is 3 m high at the peak, how long does each of the pieces of insulation need to be? Round to the nearest tenth.
I think you use the Pythagorean theorem. I got:
7sq = 3sq + b sq
49 = 9 + b sq
499=40
b = 40
after this I'm lost. what is the sq rt of 40? do I need to multiply this by 2?
pls help!!
Put this in the Google search window:
sqrt(40)
(Google has a nice calculator built in. No, don't multipy it by 2. You only do ones side at a time.
so, I got sqrt40 = 6.32
does that mean that each piece of insulation needs to be 6.32 m ?
yes, that is the length of the piece from the eave to the ridge.
yes, that is the length of the piece from the eave to the ridge.
Respond to this Question
Similar Questions

math correction
Problem#1 Find the length x in each triangle. Express your answer in simplified radical form. Leg 1 = 8 hypotenuse = 10 leg 2 = x My answer is: x = ã27 Problem #2 Geometry. For the home described in exercise 15, if the roof is 7 … 
algebra
A homeowner wishes to insulate her attic with fiberglass insulation to conserve energy. The insulation comes in 40cm wide rolls that are cut to fit between the rafters in the attic.if the roof is 7 m from peak to eave and the attic … 
Algebra
A homeowner wishes to insulate her attic with fiberglass insulation to conserve energy. The insulation comes in 40cm wide rolls that are cut to fit between the rafters in the attic. If the roof is 6 m from peak to eave and the attic … 
Statistics
A quality control engineer is interested in the mean length of sheet insulation being cut automatically by machine. The desired length of the insulation is 12 ft. It is known that the standard deviation in the cutting length is 0.15 … 
algebra
A homeowner wishes to insulate her attic with fiberglass insulation to conserve energy. The insulation comes in 40cm wide rolls that are cut to fit between the rafters in the attic. If the roof is 6m from peak to eave and the attic … 
College Physics
In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius. The walls have fiberglass insulation, … 
home inspection
11. Structural failure in a roof may be due to A. the presence of a vapor barrier between the attic floor and the ceiling below. B. too little span between supporting members. C. cuts made in rafters or trusses for addition of components … 
College physics
In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius. The walls have fiberglass insulation, … 
physics
The Rfactor for housing insulation gives the thermal resistance in units of ft2 °F h/BTU. A good wall for harsh climates, corresponding to about 10 in of fiberglass, has R = 45 ft2 °F h/BTU. a) Determine the thermal resistance (in … 
math
An architect designs a house that is 12m wide. The rafters holding up the roof are equal length and meet at an angle of 68 degrees. The rafters extend 0.6m beyond the supporting wall. How long are the rafters?