Answers by Andrew Plank
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Answers by Andrew Plank

Answers by Andrew Plank
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At the beginning of an experiment, a scientist has 168 grams of radioactive goo. After 225 minutes, her sample has decayed to 5.25 grams. What is the half-life of the goo in minutes?
answered Sep 23, 2024
3 votes
81.8k views
Using the high-low method, how much is the cost per machine hour? A) $1.50 B) $2.25 C) $1.69 D) $1.34
answered Aug 30, 2024
7 votes
149k views
On the line, what is the result of (A) a⁵ divided by a²? (B) c⁴ divided by c³?
answered May 8, 2024
5 votes
10.5k views
Use the rules for logarithms and exponents to solve for [OH-] in terms of pOH.
answered Dec 26, 2023
5 votes
47.8k views
The base of a triangle is 3 inches more than 3 times the height. If the area is 30 square inches, find the base and the height.Base:_ inchesHeight: _inches
answered Jul 31, 2023
6 votes
177k views
How fast do raindrops fall in still air
answered Jul 15, 2023
2 votes
198k views
What are the approximate x-intercepts for y=(x+4)^2 -7
answered Jul 10, 2023
2 votes
206k views
NEED HELP ASAP! WHAT IS THE SIMPILIFYED FRACTION OF 1 1/3 HELP​
answered Jun 21, 2023
5 votes
155k views
I went to the park. A.IC B.DC
answered Feb 12, 2023
2 votes
126k views
What is the amount of space that a material takes up ?
answered Dec 11, 2022
5 votes
222k views
4x + 2y = 10 x - y = 13 can someone solve this for me step by step please????
answered Dec 7, 2022
3 votes
218k views
PLEASE HELP ASAP!!! Which is a solution to the following system of inequalities? 4x - 3y<9 x+3y>6 А(-2, 1) B(3, 1) C(0,4) D(1,1)
answered Sep 14, 2022
2 votes
152k views
Select the correctly punctuated sentence. A. Carlos studied for his algebra test and, his English exam. B. Carlos studied for his algebra test, and his English exam. C. Carlos studied for his algebra test
answered Jun 19, 2022
10 votes
33.6k views
Which one is not a characteristic of all parallelograms?
answered May 27, 2022
3 votes
204k views
5, 20, 80, ... what is the sequence?
answered Feb 25, 2022
2 votes
184k views
Sovle: 10 -2x = -30 Please use subsitution Show your steps to solve the equation
answered Feb 10, 2022
6 votes
160k views
In the afternoon, the person (who is 1.8 m tall) casts a shadow that is 10 m. The distance along the ground from the person (H) to the tree (G) is 24 m, and the distance from the tree (G) to the building
answered Jan 28, 2022
0 votes
195k views
A passenger train travels from Orange Grove to Lyman, a distance of 430 km. If the route takes 5.6 h, what is the train's speed?
answered Dec 5, 2021
3 votes
162k views
The rectangle shown has a perimeter of 82 cm and the given area. Its length is 5 more than five times its width. Write and solve a system of equations to find the dimensions of the rectangle. The length
answered Aug 23, 2021
4 votes
219k views
A life boat leaves a ship and floats 20 miles west and 9 miles north. If the ship's location represents the pole, what are the polar coordinates of the life boat? A. (21.93, 65.77°) B. (21.93, 114.23°)
answered Jul 25, 2021
1 vote
203k views
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