Estimate 0.00002836 then find the scientific notation

What is the meaning of the word lean in this sentence? With no relatives living nearby, and no one else to depend on, Robert had to leg on his friends during emergencies.

When using an augmented matrix to solve a system of equations, which of these is NOT an allowable elementary row operation? A. square or take the square root of any row B. multiply a row by a nonzero constant C. switch by any two rows D.

A map has a scale of 1/2 inch to 4 miles. The shortest distance between two cities on the map measures 8 inches. If d represents the shortest distance between the two cities, what is d? A. 16 mi. B. 32 mi. C. 64 mi. D. 72 mi.

since the base of the refraction cup is a half circle how can you find the radius, what is the radius.

he weather forecast warns of morning fog today. You may only be able to see 0.6 mile in front of you. How many feet is this?

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.