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Fluoride ion is poisonous in relatively low amounts: 0.2 g of F− per 70 kg of body weight can cause death. Nevertheless, in order to prevent tooth decay, F− ions are added to drinking water at a concentration
answered
Mar 23, 2020
Chemistry
middle-school
1
vote
113k
views
Please someone do it for me!
answered
Mar 7, 2020
Mathematics
high-school
3
votes
178k
views
True or false: The last nonzero digit of the halfway point is always 5.
answered
Oct 5, 2019
Mathematics
middle-school
7
votes
61.7k
views
What is a possible theme of that poem? A. Most authors find fault with others’ work. B. Critics generally discourage writes from being published. C. Writing is a great source of income. D. An author’s
answered
Aug 6, 2019
English
middle-school
6
votes
81.7k
views
You and a friend baked 400 cupcakes together. if your friend baked 60% of the cupcakes, how many cupcakes did you bake?
answered
Jul 30, 2019
Mathematics
middle-school
7
votes
170k
views
What is 22.73 rounded to the nearest whole number
answered
May 30, 2019
Mathematics
college
2
votes
179k
views
What is the area of this trapezoid? Enter your answer in the box. units2 A rectangle with a length of 10 and a height of 9 has two right triangles on each side of it with short leg lengths of 9.
answered
Jan 21, 2019
Mathematics
college
6
votes
128k
views
Write a real word problem that can be represented by the equation 7w=17.15
answered
Nov 23, 2018
Mathematics
middle-school
3
votes
86.6k
views
Happy World Ocean Day! What is the warmest ocean in the world?
answered
Nov 21, 2018
Geography
high-school
2
votes
194k
views
John and alicia are asked to clean the barn. john can clean the barn by himself in 3 hours and together they can clean the barn in 1 7/8 hours. how long would it take alicia to clean the barn by herself?
answered
Jun 20, 2018
Mathematics
middle-school
4
votes
179k
views
What is the difference between a journal written by an eyewitness to an event and a play written about the same event
answered
Jun 1, 2018
History
high-school
5
votes
98.6k
views
Which value of x is the solution of the equation 2( x-4) + 7= 3? 1. 1 2.2 3 . 6 4 . 0
answered
May 17, 2018
Mathematics
high-school
5
votes
35.2k
views
Find the value of y so that the line through (2,3) and (5,y) has a slope of -2 A. -3 B. 3/2 C. 9 D. 9/2
answered
May 7, 2018
Mathematics
high-school
3
votes
22.1k
views
A condition of late adulthood in which the pressure in the eye increases is a. osteoporosis. b. glaucoma. c. bulimia. d. cataracts.
answered
Jun 7, 2017
Health
high-school
3
votes
204k
views
Skimming the bottom In the company of toes, I observe the deep end Though nobody knows. In the depths, I am bold, On the surface—shy. My goggles transform me: An underwater spy. What is the poem’s rhyme
answered
Apr 25, 2017
English
high-school
1
vote
77.8k
views
Which of the following best describes the early modern Islamic world?
answered
Jan 15, 2017
History
high-school
6
votes
110k
views
What question did Mendel try to answer?
answered
Jul 21, 2015
Biology
high-school
4
votes
11.6k
views
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