I'm glad to meet y'all here. I just wanna try this learning website. Can you help me about these problems? My teacher has already been asked these questions although, I have no idea about this topic. I hope you can help me such this thing. Thanks in advance. I really appreciate it.

The topics covered are:

a. Exponent

b. Scientific Notation and Powers of 10

c. Algebra

d. Direct, Inverse, and Inverse-Square Relationships

e. Logarithmic and Exponential Function

f. Areas and Volumes

g. Plane Geometry and Trigonometry

1.) Express the following expressions in scientific notation:

a. 475000

b. 0.00000472

4.) If x is proportional to y and x 2 when y 10, what is the value of x when y 8?

5.) Use the properties of logarithms and write the expression in terms of logarithms of x, y, and z.

6.) Computation: Areas and Volumes

a. Compute the circumference and area of a circle of radius 0.12 m.

b. Compute the surface area and volume of a sphere of radius 0.21 m.

c. Compute the total surface area and volume of a rectangular solid of length 0.18 m, width 0.15 m, and height 0.8 m.

d. Compute the total surface area and volume of a cylinder of radius 0.18 m and height 0.33 m.

7.) A right triangle has a hypotenuse of length 20 cm and another side of length 16 cm. Determine the third side of the triangle and the other two angles of the triangle.

8.) In a stairway, each step is set back 30 cm from the next lower step. If the stairway rises at an angle of with the horizontal, what is the height of each step?

I hope you can help me! Other questions I've already been removed. My teacher hasn't provide an equation. I'm sorry about that.