math
in a set of number rods,there is one rod of length 10,2 rods of length 9,3 of length 8,and so on.If all these rods were laid end to end in one line,how long would the line be ?
math
is it day 20,or day 15
math
a gardener places lilies in a pond.He does on the first day of the month of september.it double in volume every day until the last day of the month,the pool is full.On what day of the month was the pool half full of lilies?
math
if X is 10% of two other numbers,Y and Z,and Z is 3 times the value of Y.What percentage is X of Y alone ? please show me how you work it out,thanks
BIOLOGY
The gastrointestinal phase of gastric secretion:? a. is controlled by the entrance of acidic chyme into the duodenum. b. leads to increased gastric secretion if duodenal pH falls below 2. c. only stimulates gastric secretion. d. will decrease gastric secretion when gastrin is ...
Spanish
Can someone please check if my answers are correct? combina las palabras lógicamente. 1. la langosta 2. la salchicha 3. el ají 4. el caldo 5. el sacacorchos 6. hornear 7. los ingredientes 8. la sal 9. el durazno 10. el aderezo a. el vino b. la toronja c. la sopa ...
chem
the units are the amount the ph changes
chem
By what factor does [H+] change for each pH change? (a) 3.60 units (b) 0.33 units how do you do this?
math
chickens have 2 feet. Rabbit have 4. They both each have 1 head. Let x be chickens and y be rabbits. 2(x + y = 18) 2x + 4y = 58 The subtract the equations from each other. 2x + 4y = 58 2x + 2y = 36 ------------- 2y = 22 y = 11 so x = 7
math
5 - y/2 = 3 -y/2 = -2 y/2 = 2 y = 4
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