Ayyy

I play a lot of basketball and I use knee straps, which works just fine but I'd like to go a step up from that. Any suggestion would be nice. It has to be a brace that won't slide off while playing.

So I'm looking to upgrade the sound in my car. I'd rather leave out a standalone subwoofer if i can, so I want some opinions or suggestions about the best speakers you can get for this truck.

The dash holds two 4x6 speakers and they currently have two Pioneer 2-way speakers that sound great, actually. I'd still like to upgrade though. I'm more concerned with the 6.5-inch door speakers. I "upgraded" because I had one speaker that I blew and just got the quickest thing (two 2-way JVC speakers). Not the best idea even though it occasionally sounds good. They have a nasty bass sound when I turn up the volume. I'd like a great bass sound for the door speakers. The dash doesn't matter as much though suggestions for it are also welcome.

I'm looking to upgrade my radio and I want something with bluetooth that is reliable and won't kill me in the bank.

Trying to help someone here and it's been a REAL long time since I've done this stuff. I'll probably pick up on it after help with just this one. Aside from the original question, it's telling me to write it in interval notation and to graph it. Anyone mind helping us out here?

so here is the question...

when surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced.

CaCO3+H2CO3==>Ca(HCO3)2

what mass of limestone must have dissolved if 3.05 x 10^10kg of calcium hydrogen carbonate was produced?