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The function f defined by = |x-5/2| ,x ∈ R has a local maxima of x=5/2. true/false? justify
A Riemann integrable function is not necessarily differentiable.true/false? justify
Every function differentiable on [a, b] is bounded on [a, b]. true/false ? justify
1/2 is a limit of the interval ]-2.5,1.5[. true/false justify
A fidget spinner that is out of balance is three sided. One arm at each at 120 degrees. At rest it finds the lowest arm in the 5 o'clock position. Assume position 3oclock is 90 degrees at 6 o'clock is 180 degrees, consider 5oclock position at 150degrees. Consider that arm variable "X". Without knowing the precise weights of each arm, what calculation can be used to balance as ratio to "X", the arm at 9 o'clock as "Y". Arm at 1 o'clock "Z"?
(X-1)/-3=(5y +1)/-2,z=3 is the equation of a line with direction ratios 3,-2,1
State whether the following statement is true or false. Give reasons for your answer
Ether, an organic compound that used to be used as an anesthetic, has a density of 0.736g/cm^3 at 20 degrees Celsius . What is the volume, in liters, of 225.0 grams of ether?
Assign an oxidation number to each element in the reaction.

CaF2(s) + H2SO4(aq) → CaSO4(aq) + 2HF(g)

In CaF2, the oxidation number of Ca is
, and that of F is
. In H2SO4, the oxidation number of H is
, that of S is
, and that of O is
. In CaSO4, the oxidation number of Ca is
, that of S is
, and that of O is
. In HF, the oxidation number of H is
, and that of F is

my name is mehran.i am very interested in environmental science and i am going to study that next year for bachelor's degree.i don't know any subject related to that and i need to know what should i read to be prepard for this major? because i know everything in this field is about chemistry i mean how much chemistry i have to know before studyingenvironmental science and what kind of chemistry books i should read? thanks.
Calculate volume of solution of HCl of density 1.12g/ml containing 40% by weight of HCl needed to produce 1.78 litres of Cl2 at STP.

MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2