Large-scale commercial extraction of oil from oil shale and oil sand 1.produces an oil that cannot be used to produce gasoline.

2.are impractical sources of oil that will not ever be used widely.

3.are relatively easy, low impact methods that remain to be used.

4.will only be cost-effective at much higher oil prices.

It’s centred over the equator so 0

Airplanes usually fly in the lower part of the stratosphere - there is nearly no water vapor and it's very dry, so it to avoid big turbulences. it's about 8-10 kilometers above ground (depending on weather conditions, region etc.)

Best describes perigee is that the closest to the point in the moons orbit to the earth so your right answer is c.

good luck
: )

Ithink the correct answer would be false. having volumes of two triangular prisms being the same does not mean that they are congruent. you can only say that shapes are congruent when you can slide, flip or turn one so that it would fit exactly to the other shape. the can be congruent when the side length and the measurement of the angles in the shapes are the same or equal. having equal volumes does not necessarily mean they have the same measurement of their angles and side lengths. they could have different slant heights and the areas of their bases.