Aclimber who is 6 feet tall, casts a shadow that is 20 feet tall, at the same time that a tree casts a shadow which is 90 feet long. how tall is the tree? (type your answer as a whole number followed by the unit abbreviation, like this example: 12 ft.)

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr