Scientific Operations Worksheets Grade 7

1. A research lab is studying bacterial growth. They observe that a particular strain of bacteria doubles its population every 3 hours. If the lab starts with 1.5 × 10³ bacteria in a petri dish, how many bacteria will be present after 9 hours? Express your answer in scientific notation.
2. (8.8 × 10⁷) × (9.5 × 10³) = ?
3. Mere is drawing a scale model of a rectangular park. On her diagram, the park has a length of 3.5 × 10⁻¹ meters and a width of 2.0 × 10⁻¹ meters. In the actual park, the length is 1.4 × 10³ meters. If the park is a scaled rectangle, what is the area of the actual park in square meters? Express your answer in scientific notation.

…and 5 more problems

1. A research lab is studying bacteria growth. They observe that a certain bacteria colony doubles in size every 3 hours. If the colony starts with 1.5 × 10^4 bacteria, how many bacteria will be present after 12 hours? Express your answer in scientific notation.
2. (6.5 × 10⁷) × (4.0 × 10³) = ?
3. A right triangle is drawn on a coordinate plane with vertices at (0,0), (12,0), and (12,5). What is the length of the hypotenuse of this triangle?

…and 4 more problems

1. (7.5 × 10⁹) ÷ (2.5 × 10³) = ?
2. A scientist is studying the growth of bacteria in two different petri dishes. Dish A starts with 3.2 × 10^5 bacteria and doubles every 4 hours. Dish B starts with 1.8 × 10^6 bacteria and triples every 6 hours. After 12 hours, which dish will have more bacteria and by how much? Express your answer in scientific notation.
3. (3.4 × 10⁵) × (2.5 × 10³) = ?

…and 5 more problems