PLEASE HELP WILL MARK 1. Tim mowed lawns for 2 hours and earns $7.50 per hour. The he washed windows for 4 hours and earned $6.30 per hour. What were Tim's average earnings per hour for all 6 hours?

2. When Nasim cleaned his room he found the ratio of clean clothes to dirty clothes was 3 to 4. If 35 articles of clothing were discovered, how many were clean?

3. In 25 minutes, 400 costumers entered the attraction. At this rate, how many costumers would enter the attraction in 1 hour.

4. The vertices of ∆ABC are A (1,1), B (5,1) and C (3,3). Draw the triangle and its
image ∆ A’B’C’ translated 6 units to the left. . What are the coordinates of the
vertices of ∆ A’B’C’?

5. Natasha found that the 14 inches from her knee joint to her hip joint was 1/4 of her total weight.
What was Natasha's total height in inches?

Submarines control how much they float or sink in the ocean by changing the volume of air and water contained in large ballast tanks. when the tanks are completely full of water, the submarine increases its overall mass and sinks down to the bottom. when the tanks are completely full of air, the submarine reduces its overall mass and floats to the surface. depending on the density of the seawater surrounding the submarine, it will pump seawater in or out of the tanks in order to achieve the same overall density as the sea water and float neutrally in the water. the volume of the submarine never changes. when the tanks are completely full of water, a submarine with a volume of 7.8\times10^3\text{ m}^37.8×10 3 m 3 7, point, 8, times, 10, start superscript, 3, end superscript, space, m, start superscript, 3, end superscript has a total mass of 8\times10^6\text{ kg}8×10 6 kg8, times, 10, start superscript, 6, end superscript, space, k, g. the density of the seawater is 10^3\text{ kg/m}^310 3 kg/m 3 10, start superscript, 3, end superscript, space, k, g, slash, m, start superscript, 3, end superscript. to make that submarine float neutrally, and neither float nor sink in the ocean, what volume of water does that submarine need to subtract from its tanks?