Brian's scores on his first four spanish test are 92, 85, 90, and 92. What test score must Brian earn on the fifth test so that the mean will be exactly 90?

What is the rock cycle?

Where did all the sand in the sahara desert come from?

One micrometer is a millionth of a meter. A certain spider we is 4 micrometers thick. A fier in a shirt is 1 hundred-thousandth of meter thick. Which is wider, the spider web or the fiber?

The variation of life in a particular species, ecosystem, or planet is called?

Discuss the cause for unsettled weather and storms. Be thorough.

Does oceanwater contain any other minerals than salt

What comes to bedsides icy bridges battlefronts and crumbling bridges?

How did the black death affect medieval Europe

Which mountain rage separates Georgia and Russia

Which of the following areas is the most inaccessible to humans? Papua New Guinea Micronesia Guam South Pole